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  1. Some of Wyoming's vertebrate fossils / compliments of Passenger Department, Union Pacific R.R. Co.
    By: Union Pacific Railroad Company.
    Publication info: Omaha, Neb. :Union Pacific,c1899.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  2. Some of Wyoming's vertebrate fossils.
    By: Union Pacific Railroad Company.
    Publication info: Omaha,1899
    Contributed by: University of California Libraries (archive.org)
    View Book