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A catalog of the Diptera of America North of Mexico

A. Stone ; C. Sabrosky ; W. Wirth ; R. Foote ; J. Coulson | Washington [USA] : USDA | 1965

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Releases of beneficial organisms in the united states and territories - 1981

J. Coulson ; USDA United States Department of Agriculture, Springfield VA (USA). Agricultural Research Service ; A. Carrell ; D. Vincent | Springfield [USA] : USDA, ARS Agricultural Research Service | Miscellaneous Publication (USA) | 1988

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Releases of beneficial organisms in the united states and territories- 1982

J. Coulson ; USDA United States Department of Agriculture, Springfield VA (USA). Agricultural Research Service | Springfield [USA] : USDA, ARS Agricultural Research Service | Miscellaneous Publication (USA) | 1992

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