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By: Dahlgren, B. E. (Bror Eric), - Field Museum of Natural History. Department of Geology.Edition:Publication info: Chicago, Field Museum Press, 1933Volume: no.14 (1933)Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Bossen Carboniferous Carboon Paleobotany Petrified forestsBHL Collections: