Some geological interpretations and the significance of certain plant microfossils in Pennsylvanian strata of the Ohio Valley in northern West Virginia
Reference:
Cross,A.T. (1961)
Some geological interpretations and the significance of certain plant microfossils in Pennsylvanian strata of the Ohio Valley in northern West Virginia Conference on the Origin and Constitution of Coal,Proceedings,3rd.Nova Scotia Research Foundation,Halifax,1956
P. 295- 296