dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Downs, R J
    Type: Article
    In: Journal of the Washington Academy of Sciences
    Volume: 54
    Date: 1964
    Page Range: 112--120
    Publication Info: Washington [etc Washington Academy of Sciences]
  2. By: Smith, Lyman B. - Downs, R J
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 73
    Date: 1960
    Page Range: 245--260
    Publication Info: Washington, Biological Society of Washington,