Studies on longevity and productivity in trichogramma evanescens
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Studies on longevity and productivity in trichogramma evanescens
United States G.P.O., 1938
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注記
Thesis--The University of Minnesota
"Reprinted from Journal of agricultural research, vol. 56, no. 6, 1938"--t.p.
"Issued by authority of The Secretary of Agriculture with the Cooperation of the Association of Land-Grant Colleges and Universities"--t.p.