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  1. By: Porter, B. A. (Bennet Allen), - Alden, Charles H. (Charles Harold),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1924.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Snapp, Oliver I. - Alden, Charles H. (Charles Harold),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1924.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Snapp, Oliver I. - Alden, Charles H. (Charles Harold),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1923.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library