WV Showing Regional Variations of Fixed Carbon (Dry, Mineral-Matter-Free Basis) and Isocarb Lines, 1939

WV Showing Regional Variations of Fixed Carbon (Dry, Mineral-Matter-Free Basis) and Isocarb Lines, 1939, Folder: 17. Robert W. Craigo, Collector, Geological, Topographical, and Other Maps of West Virginia, A&M 2622. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/170544 Accessed April 30, 2026.