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journalAt: Bulletin of the United States Geological Survey, 1919, 696 By: Knowlton F. H.
bookAt: Cat. Org. Remains Perm. Rocks, Newcastle-upon-Tyne, Printed for and published by the Author, and sold by all booksellers By: King W.
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journalAt: Journal of geosciences (Osaka), 19, Art. 2 By: Nirei H.
journalAt: Botanical Review By: Jiménez-Mejías P., Martinetto E., Momohara A., Popova S. S., Smith S. Y., Roalson E. H.