-
By: Parker, William Bell.Edition:Publication info: Washington, Govt. print. off, 1913Volume:Series:Holding Institution: Library of CongressSubjects: Hop-aphisBHL Collections:
-
By: Parker, William B. (William Bell),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1913Volume: new ser.:no.111 (1913)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Hop-aphis Northwestern StatesBHL Collections: