Sort By:
  1. Birds of Pennsylvania. Provisional list, including natives, permanent residents, winter residents, spring and fall migrants, occasional visitants and "stragglers" or accidental visitants.
    By: Warren, Benjamin Harry,
    Publication info: [n.d.]
    Contributed by: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
    View Book
  2. Diseases and enemies of poultry / by Leonard Pearson and B.H. Warren.
    By: Pearson, Leonard, - Warren, Benjamin Harry,
    Publication info: [Harrisburg, Pa.] :C.M. Busch,1897.
    Contributed by: University of California Libraries (
    View Book