Bibliography
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- Comstock, J. H. “An Introduction to Entomology. 9th ed. rev., Ithaca: Comstock Publishing Co. (1940)
- Belding, D. L. “Textbook of Clinical Parasitology.” (1942)
- Essig, E. O., and Hoskins, W. M. “Insects and Other Pests Attacking Agricultural Crops.” Calif. Agr. Ext. Service, Circ. Berkeley No. 87, (1934 Rev.) (1944)
- U. S. Dept. Agr. Hoerner, G. R., and Rabak, F. “Production of Hops” Farmers' Bull. No. 1842 (1940)
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