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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Marshall, F. R. - Potts, C. G. (Carl Grady),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1921
    Holding Institution: Multiple institutions
  2. By: Marshall, F. R. - Potts, C. G. (Carl Grady),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1921
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library