Shepard, Harold H.

Applied entomology; an introductory textbook of insects in their relations to man Fernald, H T 1955 Methods of Testing Chemicals on Insects Shepard, Harold H 1960 The chemistry and action of insecticides Shepard, Harold H. 1951 The chemistry and action of insecticides Shepard, Harold H. Year not listed The chemistry and Action of Insectisides Shepard, Harold H. 1951 The chemistry and actions of insection Shepard, Harold H. Year not listed The chemistry and toxicology of insecticides Shepard, Harold H. 1940