Palynological analyses of Upper Pennsylvanian coal beds and adjacent strata from the proposed Pennsylvanian system stratotype in West Virginia : a report on the stratigraphic distribution and abundance of Upper Pennsylvanian palynomorphs /
Kosanke, Robert M.(Robert Max)
Washington : U.S. G.P.O.,
1988.
Palynology
Geology, Stratigraphic
Coal