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  1. By: Peterson, Sigfred
    Type: Article
    In: Transactions of the Kentucky Academy of Science
    Volume: 13
    Issue: 2
    Date: 1950-08
    Page Range: 102--103
    Publication Info: [Lexington, Ky.], Kentucky Academy of Science, 1923-1997
  2. By: Peterson, Sigfred - Cooper, Orland W.
    Type: Article
    In: Transactions of the Kentucky Academy of Science
    Volume: 13
    Issue: 3
    Date: 1951-08
    Page Range: 146--148
    Publication Info: [Lexington, Ky.], Kentucky Academy of Science, 1923-1997
  3. By: Peterson, Sigfred - Jeffers, Robert W.
    Type: Article
    In: Transactions of the Kentucky Academy of Science
    Volume: 13
    Issue: 4
    Date: 1952-08
    Page Range: 277--284
    Publication Info: [Lexington, Ky.], Kentucky Academy of Science, 1923-1997
  4. By: Peterson, Sigfred - Spessard, John E.
    Type: Article
    In: Transactions of the Kentucky Academy of Science
    Volume: 14
    Issue: 3-4
    Date: 1954-04
    Page Range: 94--96
    Publication Info: [Lexington, Ky.], Kentucky Academy of Science, 1923-1997