C. O. Johnston
L. E. Melchers
Irvin Milburn Atkins
United States. Bureau of Plant Industry
C. R. Hursh
E. C. Stakman
Ruth F. Allen
Lehmann, Ernst
George William Fischer
United States. Department of Agriculture. National Agricultural Library.
D. L. Bailey
United States. Agricultural Research Service
J. Allen Clark
Crystal A. Rose
Edith M. Patch
United States.: Bureau of Entomology and Plant Quarantine
Zeek K. Gerechter-Amitai
United States. Plant Pest Control Division