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  1. Hypsocrinus, a new genus of crinoids from the Devonian / By Frank Springer and Arthur Ware Slocom -- ; Oliver Cummings Farrington --
    By: Springer, Frank. - Farrington, Oliver C. - Slocom, Arthur Ware, - Field Columbian Museum.
    Publication info: Chicago :Field Columbian Museum ,1906.
    Contributed by: University Library, University of Illinois Urbana Champaign
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  2. The North American Crinoidea camerata / by Charles Wachsmuth and Frank Springer.
    By: Wachsmuth, C. - Wachsmuth, Charles, - Springer, Frank, - Springer, Frank.
    Publication info: Cambridge, U.S.A. :Printed for the Museum,1897.
    Contributed by: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
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