Insects affecting flowers.
Series of educational illustrations ; 13.4.
United States. Department of Agriculture.
United States. Extension Service.
United States. Bureau of Entomology and Plant Quarantine.
Washington D.C. :United States Department of Agriculture,1941.
"Prepared by Extension Service, in cooperation with the Bureau of Entomology and Plant Quarantine, United States Department of Agriculture, Washington, D.C."
"Group no. 13--Insects (Chart no. 13.4)."
Diseases and pests
NAL: 1.8 Ex892E no. 13.4
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