Urbana, Ill. : University of Illinois, College of Agriculture, Agricultural Experiment Station and Extension Service in Agriculture and Home Economics,
Publication date
01/01/1937
Field of study
In cooperation with Illinois State Natural History Survey
Urbana, Ill. : University of Illinois, Agricultural Experiment Station in cooperation with the Illinois Natural History Survey and the U.S. Department of Agriculture,
Publication date
01/01/1959
Field of study
"This study was supported in part by Research and Marketing Act funds allocated to North Central project 19, "Pesticide Hazards"--P. [2]. "Cover title.Bibliography: p. 28