20230919162425.518450 0372-4913 hathi HathiTrust https://catalog.hathitrust.org/Record/000495451 2024-03-01 no.11-20 no.11-20 Preserved The University Library, Published by the Librarian, 1900-1948. University of Toronto studies. Geological series. 0372-4913 University of Toronto Studies, Geological Series Ontario University of Toronto studies. University of Toronto studies. University of Toronto Studies, Geological Series