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A forest of the coal age / by B. E. Dahlgren, Acting Curator, Dept. of Botany.
By: Dahlgren, B. E. - Field Museum of Natural History.
Publication info: Chicago :Field Museum Press,1933.
Contributed by: University of Illinois Urbana Champaign
Subjects: Bossen Carboniferous Carboon Paleobotany Petrified forests