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  1. By: Welander, Arthur D - Schultz, Leonard P. (Leonard Peter),
    Type: Article
    In: Journal of the Washington Academy of Sciences
    Volume: 41
    Date: 1951
    Page Range: 107--110
    Publication Info: Washington [etc Washington Academy of Sciences]
  2. By: Schultz, Leonard P. (Leonard Peter), - Herald, Earl S - Lachner, Ernest A. - Welander, Arthur D - Woods, Loren P. (Loren Paul),
    Type: Article
    In: Bulletin
    Volume: 202
    Date: 1954
    Page Range: 1--685
    Publication Info: Washington G.P.O 1907-1971