C. J. Nicholas / Frederick H. Berry / Gary W. Frasier / Judith A. Quick / R. C. Beckwith / Robert L. Anderson / Elizabeth W. Murphy / Lloyd E. Myers / Richard R. Mason / H. Gene Paul

UIUC:30112019249553

Cotton manufacture

Richard R. Mason / R. C. Beckwith

MINN:31951D02986420K

Sampling (Statistics)

R. C. Beckwith

OCLC:893556199

Bacillus thuringiensis

David G. Grimble

MINN:31951D029959768

Lepidoptera

R. C. Beckwith / Richard R. Mason / H. Gene Paul

IND:30000092092547

Douglas fir

Robert W. Campbell / Nilima Srivastava / Torolf R. Torgersen / R. C. Beckwith

OCLC:949261328

Insect pests

R. C. Beckwith

MINN:31951D02995490Y

Bark beetles

R. C. Beckwith / Richard R. Mason / H. Gene Paul

MINN:31951D00630320D

Agriculture

R. C. Beckwith

OCLC:83527582

R. C. Beckwith / Jerry O. Wolff / John C. Zasada

MINN:31951P010939838

Bark beetles

R. C. Beckwith

IND:30000091992598

Aspen

R. C. Beckwith

OCLC:704143956

R. C. Beckwith / Forestry Sciences Laboratory (Corvallis, Or.)

OCLC:81864971

Lymantriidae

Robert R. Mason

OCLC:1040042218

Spruce budworm

Donald L. Copes / R. C. Beckwith

OCLC:951067865

Conifers

Kristian R. C. Beckwith

OCLC:912847180

J. M. Schmid

IND:30000091992267

Spruce beetle

R. C. Beckwith

OCLC:67644964

R. C. Beckwith / Richard R. Mason / H. Gene Paul / Combined Forest Pest Research and Development Program (U.S.)

OCLC:246328752

Douglas fir tussock moth

Frederick H. Berry / Gary W. Frasier / Judith A. Quick / R. C. Beckwith / Robert L. Anderson / Elizabeth W. Murphy / Lloyd E. Myers / Richard R. Mason / H. Gene Paul

OCLC:8652131

Cotton manufacture

R. C. Beckwith

OCLC:81363779

R. C. Beckwith / R.R. Mason / H. Gene Paul

OCLC:1288999949

Douglas fir tussock moth

R. C. Beckwith

MINN:31951D02986663U

Boise National Forest (Idaho)

R. C. Beckwith

UVA:X001754997

Douglas-fir tussock moth

R. C. Beckwith

OCLC:1131349524

Boyd E. Wickman / Charles P. Schwalbe / Edward E. Simons / Franklin W. Martin / Harvey R. Smith / J. D. Podgwaite / Jerald E. Dewey / R. C. Beckwith / Raymond Carl Rietz / United States. Food Safety and Quality Service / Walter H. Wischmeier / Lucien Degras / R. A. Lautenschlager / Richard C. Reardon / Mark Ticehurst

LCCN:78600012

Aerial spraying and dusting in agriculture

R. C. Beckwith

OCLC:708700828

R. C. Beckwith / United States. Department of Agriculture

OCLC:84278738

Douglas fir tussock moth

R. C. Beckwith

OCLC:13261008

Larvae

R. C. Beckwith / Jerry O. Wolff / John C. Zasada

OCLC:67646938

Bark beetles