Important insecticides
Marlatt, C.L.
Important insecticides Directions for their preparation and use - Washington 1898 - 1-32 p. - Insecticides United States Department of Agriculture. Farmers Bulletin No. 19 .
Important insecticides Directions for their preparation and use - Washington 1898 - 1-32 p. - Insecticides United States Department of Agriculture. Farmers Bulletin No. 19 .