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  1. By: Yerkes, Arnold Phipps, - Mowry, H. H. (Herbert Hager),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Yerkes, Arnold Phipps, - Church, L. M. (Lillian M.),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library