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  1. By: Graham, Edward H. (Edward Harrison), - United States. Soil Conservation Service.
    Publication info: Washington, D.C, Dept. of Agriculture, 1941
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Graham, Edward H. (Edward Harrison),
    Type: Article
    In: Annals of the Carnegie Museum
    Volume: 26
    Date: 1936-12
    Page Range: 1--432
    Publication Info: [Pittsburgh], Published by authority of the Board of Trustees of the Carnegie Institute, 1901-
  2. By: Graham, Edward H. (Edward Harrison),
    Type: Article
    In: Annals of the Carnegie Museum
    Volume: 22
    Date: 1934-02-01
    Page Range: 17--292
    Publication Info: [Pittsburgh], Published by authority of the Board of Trustees of the Carnegie Institute, 1901-