Insecticides and fungicides
Haywood, J.K.
Insecticides and fungicides Chemical composition and effectiveness of certain preparations - Washington 1902 - 1-16 p. - Insecticides, Fungicides United States Depatment of Agriculture. Farmers Bulletin No. 146 .
Insecticides and fungicides Chemical composition and effectiveness of certain preparations - Washington 1902 - 1-16 p. - Insecticides, Fungicides United States Depatment of Agriculture. Farmers Bulletin No. 146 .