Notes: | "Private edition distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from the Journal of geology, Vol. XXV, Nos. 2-4, 1917." Thesis (PH. D.)--University of Chicago, 1916. Also available as electronic reproduction. Chicago : University of Chicago Library, [2006] Master and use copy. Digital Master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials. Version 1. Digital Library Federation, December 2002 http://www.diglib.org/standards/bmarkfin.htm digitized 2006 University of Chicago Library committed to preserve
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