Hessian-fly and the western wheat-stem saw-fly
Criddle, Norman
Hessian-fly and the western wheat-stem saw-fly - Ottawa 1915 - 1-23 p. - Wheat Dominion of Canada Department of Agricultural Entomological Branch. Bulletin No. 11 .
Hessian-fly and the western wheat-stem saw-fly - Ottawa 1915 - 1-23 p. - Wheat Dominion of Canada Department of Agricultural Entomological Branch. Bulletin No. 11 .