Palynological studies of Middle Pennsylvanian coal beds of the proposed Pennsylvania System stratotype in West Virginia Kosanke, Robert M. (Robert Max) creator author. Geological Survey (U.S.) issuing body. text bibliography Electronic books. vau 1988 monographic eng remote 1 online resource (vi, 73 pages, 3 pages of plates) : illustrations. by Robert M. Kosanke. Includes bibliographical references (pages 72-73). n-us-wv Palynology West Virginia Paleobotany Pennsylvanian Coal Geology West Virginia Coal Geology Paleobotany Palynology Pennsylvanian Geologic Period West Virginia From 280 to 310 million years ago fast I 19.16:1455 I 19.16:1455 Palynological studies of Middle Pennsylvanian coal beds of the proposed Pennsylvania System stratotype in West Virginia Kosanke, Robert M. (Robert Max) (DLC) 86600336 (OCoLC)14214993 U.S. Geological Survey professional paper ; 1455 https://purl.fdlp.gov/GPO/gpo151814 COP 180601 20211120111557.0 in00004418495 eng