Methods and principles for interpreting the phenology of crop pests
By: by L. R. Tehon.  Printed by the authority of the state of Illinois.
Publisher: Schnepp & Barnes, printers
Published: 1928
Place of publication: Urbana, Illinois; [Springfield
Language: eng
Number of pages: 346
Subjects: Crops and climate.; Agricultural pests.; Phenology.
Notes: Bibliography: p. 346.
At head of title: State of Illinois. Department of Registration and Education. Divison of the Natural History Survey, Stephen A. Forbes, chief.