The later extinct floras of North America Newberry, J. S. (John Strong), 1822-1892 creator Hollick, Charles Arthur, 1857-1933 ed. contributor text book Washington Govt. Print. Off 1898 1898
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ENG North America Paleobotany QE75 .M7 vol.35 561.1973 Monographs of the United States Geological Survey, v. 35 https://www.biodiversitylibrary.org/bibliography/42496 https://www.biodiversitylibrary.org/bibliography/36429 553303 gs05000817 10.5962/bhl.title.36429 WSU