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Time factors of differentially preserved wood in two calcitic concretions in Pennsylvanian black shale from Indiana

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By: Woodland, Bertram G. - Richardson, Catherine Kessler,

Publication info: Chicago, Field Museum of Natural History, 1975

Holding Institution: University Library, University of Illinois Urbana Champaign

Subjects: Indiana Paleobotany Pennsylvanian Pike County Shale Trees, Fossil