Albrecht Eichhorn / C. H. Hadley / Carl Rohwer / Clarice Louisba Scott / Clifford Leslie Hamilton / E. C. Tullis / Edmund Lambert / Elma Edwards / Frank Custer Edminster / Freeman Weiss / Furman Lloyd Mulford / Glenn Kenton Rule / Harry L. Garver / Lucia McCulloch / Merton Chesleigh Lane / Norman Allen / Oliver I. Snapp / Roland McKee / Roy Douglas Hockensmith / Royal Joyslin Haskell / Samuel Benton Nuckols / Thomas Arrington Huntington Miller / Arthur Burdick Crawford / Edward G. Molander / Perry Kips Harrison / Sears Polydore Doolittle

CUB:U183021566079

Agricultural machinery

Roy Douglas Hockensmith / John Gordon Steele

UVA:X030490666

Soil erosion

Roy Douglas Hockensmith

UCR:31210024996868

Soil conservation

Carl Rohwer / David Wield Robertson / Earl Douglass / Franklin Thomas Cowan / George Anderson Beach / George Warren Deming / James C. Foster / Mark Alfred Barmore / Robert Gardner / Roy Douglas Hockensmith / Carey Eugene Vail / James Bennett Goodwin / Justice Conrad Ward / Alvin Kezer / Joseph William Tobiska

UIUC:30112019449617

Agriculture

American Association for the Advancement of Science / Roy Douglas HOCKENSMITH

OCLC:504268029

Roy Douglas Hockensmith / John Gordon Steele

UVA:X030490666

Soil erosion

Albrecht Eichhorn / C. H. Hadley / Carl Rohwer / Clarice Louisba Scott / Clifford Leslie Hamilton / E. C. Tullis / Edmund Lambert / Elma Edwards / Frank Custer Edminster / Freeman Weiss / Furman Lloyd Mulford / Glenn Kenton Rule / Harry L. Garver / Lucia McCulloch / Merton Chesleigh Lane / Norman Allen / Oliver I. Snapp / Roland McKee / Roy Douglas Hockensmith / Royal Joyslin Haskell / Samuel Benton Nuckols / Thomas Arrington Huntington Miller / Arthur Burdick Crawford / Edward G. Molander / Perry Kips Harrison / Sears Polydore Doolittle

CUB:U183021566079

Agricultural machinery

Roy Douglas Hockensmith

UCR:31210024996868

Soil conservation

Roy Douglas Hockensmith

OCLC:71038199

Carl Rohwer / David Wield Robertson / Earl Douglass / Franklin Thomas Cowan / George Anderson Beach / George Warren Deming / James C. Foster / Mark Alfred Barmore / Robert Gardner / Roy Douglas Hockensmith / Carey Eugene Vail / James Bennett Goodwin / Justice Conrad Ward / Alvin Kezer / Joseph William Tobiska

UIUC:30112019449617

Agriculture

Roy Douglas Hockensmith / John Gordon Steele

OCLC:1031633536

Soil erosion

OCLC:1084393275

Soil conservation

Roy Douglas Hockensmith / Caribbean Commission

OCLC:71077717

West Indian Conference

Roy Douglas Hockensmith / United States. Soil Conservation Service

OCLC:526874210

Land use, Rural

Roy Douglas Hockensmith

1258344904 / 9781258344900

R. D. Hockensmith

OCLC:67635887

Roy Douglas Hockensmith / John Gordon Steele

OCLC:12324182

Soil erosion

Roy Douglas Hockensmith

OCLC:526868863

Soils

Roy Douglas Hockensmith / James Bennett Goodwin / Robert Gardner / Colorado Agricultural Experiment Station

OCLC:23661616

Calcareous soils

Roy Douglas Hockensmith

OCLC:9416438

Agriculture

Carl Rohwer / Charles Harvey Hadley / Clarice Louisba Scott Scott / Edgar Cecil Tullis / Freeman Albert Weiss / Roland McKee / Roy Douglas Hockensmith / Raymond Alexander St. George

OCLC:14990742

Boxwood

OCLC:85233802

Agricultural conservation

Roy Douglass Hockensmith

OCLC:25326371

Roy Douglas Hockensmith / United States. Soil Conservation Service

OCLC:463006971

Land use, Rural

Roy Douglas Hockensmith

OCLC:62677179

Soils

Roy Douglas Hockensmith

OCLC:52896286

Land use