http://pec.lib.wvu.edu/record/P151411963Cone-in-cone in coal. <p> Serial issue. Issued as: West Virginia Geological and Economic Survey. <em>Report of investigations</em>, no. 22.</p>Price, Paul H. (Paul Holland), 1898-Shaub, Benjamin M. (Benjamin Martin)Coal--Geology--West Virginia.Coal--Geology.14256