Glenn Murphy / Lionel Kenneth Arnold / Mark Perkins Cleghorn / Orland Russell Sweeney / Herbert Plagge / Roy John Helfinstine / D. E. Anderson

OSU:32435068221019

Architectural acoustics

Harold W. Jackman / Roy John Helfinstine

STANFORD:36105008162799

Coal

Harold Wesley Jackman / Roy John Helfinstine

IND:30000143408312

Coke

David Lloyd Stevenson / Harold Bowen Willman / Harold Jay Gluskoter / Harold Wesley Jackman / Illinois State Geological Survey / James Edward Hackett / Keros Cartwright / M. E. Hopkins / T. K. Searight / Willis L. Busch / Jack Aaron Simon / John Chapman Frye / Roy John Helfinstine

UIUC:30112027200234

Aquifers

Harold Wesley Jackman / Robert Louis Eissler / Roy John Helfinstine

STANFORD:36105008162518

Coke

Chalmer Lewis Cooper / Cullen Warner Parmelee / Frank Emerson Tippie / Harold Bowen Willman / Heinz Adolf Lowenstam / Leland Horberg / Ralph Early Grim / Roy John Helfinstine / Stewart Huntley Folk / Walter Henry Voskuil / Cameron Gerald Harman / Charles C. Boley / Douglas F. Stevens / Frederick Leicester Cuthbert / Nina T. Hamrick / Robert Ramon Reynolds / William Hubert Allaway / Paul Herbert

UIUC:30112112910390

Clay

A. S. Rudolph / Dio Lewis Holl / Edward S. Lynch / Mark Perkins Cleghorn / Max Levine / Roy John Helfinstine

OSU:32435068220771

Disinfection and disinfectants

Harold Wesley Jackman / Roy John Helfinstine

UIUC:30112047131484

Coal

Mark Perkins Cleghorn / Ralph Alton Moyer / Robert Burrus Buckner Moorman / Robley Winfrey / Roy John Helfinstine

OSU:32435068220722

Automobiles

Alan Martin Jacobs / D. L. Stevenson (David Lloyd) / Gordon S. Fraser / Harold Wesley Jackman / Illinois State Geological Survey / James Watson Baxter / Norman C. Hester / Paul C. Heigold / R. N. Leamnson / Russel Allen Peppers / Willis L. Busch / Alan T. James / H. H. Damberger / Josephus Thomas / Richard Charles Anderson / Roy John Helfinstine / Henry Phillip Ehrlinger

UIUC:30112027200242

Cartography

Harold Wesley Jackman / Roy John Helfinstine

STANFORD:36105008162443

Coal

Roy John Helfinstine

UIUC:30112121903816

Coal

Harold Wesley Jackman / James Watson Baxter / Kemal Piskin / Ralph Eugene Hunter / Richard Charles Anderson / Richard David Harvey / William Henking Smith / Willis L. Busch / George A. Desborough / Gilbert Edwin Smith / John Paul Kempton / Robert Edward Bergstrom / Roy John Helfinstine / Chester W Shaw

UIUC:30112027200226

Coal

Roy John Helfinstine

UIUC:30112110760003

Coal

United States. Department of Agriculture. Production and Marketing Administration. Grain Branch / C. C. Hill / Virgil D. Moss / Warren R. Bailey / August Mark Gorenz / Clark E. Holscher / Edwin H. Fosen / Ernest E. Russell / Ernest John George / George Streator Templeton / Harold Reginald Offord / J. L. Weimer / Jenkin William Jones / Kenneth William Parker / Kirby M. Hayes / L. F. Locke / Leon Lassen / Orme Julius Kahlenberg / Robert Archibald Work / Robert Donald Davidson / Russell Oscar Olson / Selar Stephen Hutchings / Vernon Pollard Moore / William Arthur Craft / United States. Department of Agriculture / A. W. Cressman / Harry Edward Goresline / Charles August Wellner / Earl Orel Heady / Edwin Joseph Woolfolk / Howard William Lull / Bernard Frank / Roy E. Moser

OSU:32435019025063

Agriculture

Baldur H. Kristjanson / North Dakota Agricultural Experiment Station (Fargo) / Raymond J. Douglas / Rex David Helfinstine / Roy Matthew Gilcreast / Sterling Davis / Thomas John Conlon / William Edward Brentzel / C. J. Heltemes / LeRoy W. Schaffner / Leroy Moomaw

UIUC:30112001705653

Agriculture

Illinois State Geological Survey

UIUC:30112026888500

Geology

Harold Wesley Jackman / Roy John Helfinstine

IND:30000143408312

Coke

Roy John Helfinstine

1015094368 / 9781015094369

David Henry Swann / Donald Lee Graf / Douglas A. Block / Emile Desire Pierron / Glenn Charles Finger / Harold Wesley Jackman / James Mansfield Cleary / James Watson Baxter / John Albert Harrison / John Chapman Frye / Richard Charles Anderson / Thomas William Smoot / Walter Edward Parham / Walter Rose / Walter Voskuil / Wayne Franklin Meents / William Arthur White / Willis L. Busch / Harold Bowen Willman / Herbert David Glass / Orin Wainwright Rees

UIUC:30112027200143

Carbon

Roy John Helfinstine / Charles C Joint Author Boley

1014080010 / 9781014080011

Roy John Helfinstine

1013387104 / 9781013387104

David A. Stephenson / Harold Wesley Jackman / James Watson Baxter / Kemal Piskin / Ralph Eugene Hunter / Richard Charles Anderson / Richard David Harvey / Robert F. Severson / William Henking Smith / Willis L. Busch / George A. Desborough / Gilbert Edwin Smith / John Paul Kempton / Robert Edward Bergstrom / Roy John Helfinstine / Chester W Shaw

LCCN:a68007110

Coal

Chalmer Lewis Cooper / Cullen Warner Parmelee / Ernest Paul Du Bois / Frank Emerson Tippie / Frank Hynes Reed / Harold Bowen Willman / Heinz Adolf Lowenstam / Illinois State Geological Survey / James Stewart Machin / Leland Horberg / Ralph Early Grim / Robert Mann Grogan / Roy John Helfinstine / Stewart Huntley Folk / Walter Henry Voskuil / William Frank Bradley / William Heyden Easton / Cameron Gerald Harman / Carl Andrew Bays / Douglas F. Stevens / Frederick Leicester Cuthbert / Harold Wesley Jackman / John Everts Lamar / Robert Ramon Reynolds / Nina T. Hamrick / Paul Herbert / Paul Wellana Henline

OSU:32435022113377

Carbonization

Chalmer Lewis Cooper / Cullen Warner Parmelee / Frank Emerson Tippie / Harold Bowen Willman / Heinz Adolf Lowenstam / Leland Horberg / Ralph Early Grim / Roy John Helfinstine / Stewart Huntley Folk / Walter Henry Voskuil / Cameron Gerald Harman / Charles C. Boley / Douglas F. Stevens / Frederick Leicester Cuthbert / Nina T. Hamrick / Robert Ramon Reynolds / William Hubert Allaway / Paul Herbert

UIUC:30112112910390

Clay

Roy John Helfinstine

UIUC:30112121903816

Coal

Alan Martin Jacobs / D. L. Stevenson (David Lloyd) / Gordon S. Fraser / Harold Wesley Jackman / Illinois State Geological Survey / James Watson Baxter / Norman C. Hester / Paul C. Heigold / R. N. Leamnson / Russel Allen Peppers / Willis L. Busch / Alan T. James / H. H. Damberger / Josephus Thomas / Richard Charles Anderson / Roy John Helfinstine / Henry Phillip Ehrlinger

UIUC:30112027200242

Cartography

David Lloyd Stevenson / Harold Bowen Willman / Harold Jay Gluskoter / Harold Wesley Jackman / Illinois State Geological Survey / James Edward Hackett / Keros Cartwright / M. E. Hopkins / T. K. Searight / Willis L. Busch / Jack Aaron Simon / John Chapman Frye / Roy John Helfinstine

UIUC:30112027200234

Aquifers

Richard Henry Howard / Alfred Hannam Bell / David L. Reinertsen / David Lloyd Stevenson / Harold Jay Gluskoter / Harold Wesley Jackman / James C. Bradbury / John Albert Harrison / John Chapman Frye / Kenneth Edward Clegg / Lyle David McGinnis / Merlyn Boyd Buhle / Orin Wainwright Rees / Paul C. Heigold / Richard Charles Anderson / Richard David Harvey / Robert William Orr / William Arthur White / William Hilton Johnson / Willis L. Busch / John E. Brueckmann

UIUC:30112110767446

Chlorine

Harold Wesley Jackman / Illinois State Geological Survey / James Watson Baxter / Norman C. Hester / Paul C. Heigold / Russel Allen Peppers / Willis L. Busch / H. H. Damberger / Richard Charles Anderson / Roy John Helfinstine

LCCN:79629701

Cartography