Peter Hughes Westigard

UCAL:C2945526

Peter A. Henderson / T. R. E. Southwood

9781118895252 / 1118895258

Science

T. R. E. Southwood / Peter A. Henderson

9781444312300 / 1444312308

Science

Bruce Schaffer / Peter C. Andersen

9781351442794 / 1351442791

Science

Peter H. Westigard / Robert Ward Zwick

OCLC:23601129

Pear

Peter H. Westigard / Donald W. Berry / Porter B. Lombard

OCLC:23597244

Pear

Michael J. Willett

OCLC:36390917

Oil as pesticide

Peter H. Westigard

UIUC:30112019820338

Agriculture

Peter H. Westigard / Donald W. Berry / Porter B. Lombard

OCLC:6160644

Pears

Peter H. Westigard / Oregon State University. Agricultural Experiment Station

OCLC:25335302

Codling moth

Fred Bryant Gomm / Peter H. Westigard / Robert G. Clark / Robert J. Raleigh / W. P. Stephen / William Saxon McGuire

UIUC:30112019814943

Alfalfa

Andrea Clara Overman Mackey / Marie Rodgers Walt / Myron George Cropsey / Peter H. Westigard / Radclyffe Burnand Roberts / Timothy M. Hammonds

OCLC:23370961

Agricultural laborers

M. Willett / Pacific Northwest Cooperative / Peter H. Westigard / Oregon State University. Extension Service / Washington State University. Cooperative Extension / University of Idaho. Cooperative Extension Service / United States. Department of Agriculture / Pacific Northwest Cooperative Extension

OCLC:18790702

Oil as pesticide