Sort By:
  1. Black grain-stem sawfly of Europe in the United States /
    By: Gahan, A. B. (Arthur Burton),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1920.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    View Book
  2. The serphoid and chalcidoid parasites of the hessian fly /
    By: Gahan, A. B. (Arthur Burton),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1933.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    View Book