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  1. By: Ruthven, Alexander Grant, - Thompson, Crystal - Gaige, Helen Thompson - Smith, Harlan Ingersoll,
    Publication info: Lansing, Mich, Wynkoop Hallenbeck Crawford, State Printers, 1912
    Holding Institution: NCSU Libraries
  2. By: Ruthven, Alexander Grant, - Hankinson, Thomas Leroy, - Colbert, Roy J. - Thompson, Crystal - Evans, Arthur T. (Arthur Thompson), - Andrews, A. W.
    Publication info: Lansing, Mich, W. H. Crawford Co., state printers, 1916
    Holding Institution: NCSU Libraries
  3. By: Ruthven, Alexander Grant, - Andrews, A. W. - Colbert, Roy J. - Evans, Arthur T. (Arthur Thompson), - Hankinson, Thomas L. - Thompson, Crystal
    Publication info: Lansing, Mich, W.H. Crawford Co., state printers, 1916
    Holding Institution: University of British Columbia Library
  1. By: Thompson, Crystal
    Type: Article
    In: Occasional papers of the Museum of Zoology, University of Michigan
    Volume: 18
    Date: 1915
    Page Range: 1--6
    Publication Info: Ann Arbor, Mich, University of Michigan, 1913-