Não informado. (1951). Cooperative economic insect report. U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division.
Chicago-viite (17. p.)Não informado. Cooperative Economic Insect Report. Washington: U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division, 1951.
MLA-viite (8. p.)Não informado. Cooperative Economic Insect Report. U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division, 1951.
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