What has the author Ralph H Wilpolt written?

Ralph H. Wilpolt has written:

'Geology and oil and gas possibilities of upper Mississippian rocks of southwestern Virginia, southern West Virginia, and eastern Kentucky' -- subject(s): Economic Geology, Geology, Geology, Economic, Geology, Stratigraphic, Petroleum, Rocks, Sedimentary, Sedimentary Rocks, Stratigraphic Geology