Controlling important fungus and insect enemies of the pear in the humid sections of the pacific northwest /
Fisher, D. F.
Controlling important fungus and insect enemies of the pear in the humid sections of the pacific northwest / D. F. Fisher and E. J. Newcomer - Washington : Department of Agriculture - 34 p.
EUA. Dept. of Agriculture Farmers' bull.; 1056
203754
Pera -- Enfermedades por hongos Pera -- Plagas Control de plagas
Controlling important fungus and insect enemies of the pear in the humid sections of the pacific northwest / D. F. Fisher and E. J. Newcomer - Washington : Department of Agriculture - 34 p.
EUA. Dept. of Agriculture Farmers' bull.; 1056
203754
Pera -- Enfermedades por hongos Pera -- Plagas Control de plagas