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Bulletin 21 (1936-1941)

Parts

  1. By: Ross, Herbert H. (Herbert Holdsworth), - Frison, Theodore Henry, 1895-1945.
    Type: Article
    In: Bulletin
    Volume: 21
    Date: 1937
    Page Range: 57--99
    Publication info: Urbana State of Illinois, Dept. of Registration and Education, Natural History Survey Division 1918-1985
  2. By: Ross, Herbert H. (Herbert Holdsworth),
    Type: Article
    In: Bulletin
    Volume: 21
    Date: 1938
    Page Range: 101--183
    Publication info: Urbana State of Illinois, Dept. of Registration and Education, Natural History Survey Division 1918-1985