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  1. By: Lefschetz, S.
    Type: Article
    In: The Kansas University science bulletin
    Volume: 10
    Issue: 1
    Date: 1917-01-01
    Page Range: 1--9
    Publication Info: Lawrence, Kan, The University, 1902-1924
  2. By: Lefschetz, S.
    Type: Article
    In: The Kansas University science bulletin
    Volume: 9
    Issue: 6
    Date: 1914-12
    Page Range: 67--78
    Publication Info: Lawrence, Kan, The University, 1902-1924