Sort By:
  1. Flour paste as a control for red spiders and as a spreader for contact insecticides /
    By: Parker, William Bell. - United States. - United States.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture, Bureau of Entomology,1913.
    Contributed by: Unknown
    View Book
  2. The hop aphis in the Pacific region.
    By: Parker, William Bell.
    Publication info: Washington,Govt. print. off.,1913.
    Contributed by: Library of Congress
    View Book