Scientific careers in entomology research text book [Washington, D.C.] Agricultural Research Service, U.S. Dept. of Agriculture 1965 1965 Rev. Dec. 1965.
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ENG Originally issued Nov. 1961. Entomology Entomology Research Division Research United States Vocational guidance Miscellaneous publication / United States Department of Agriculture, no. 855 https://www.biodiversitylibrary.org/bibliography/65697 16127641890314 10.5962/bhl.title.65697 RQF