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  1. The Neocene lake beds of western Montana and descriptions of some new vertebrates from the Loup Fork / by Earl Douglass.
    By: Douglass, Earl,
    Publication info: [Missoula, Mont.] :The University,1899.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  2. The Tertiary of Montana / by Earl Douglass.
    By: Douglass, Earl, - Carnegie Museum.
    Publication info: Pittsburgh :Published by the authority of the Board of Trustees of the Carnegie Institute,[1905]
    Contributed by: Harold B. Lee Library (archive.org)
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