Notes on the geology of northwest Texas - Cummins, W. F. (William Fletcher), 1840-1931.; Geological Survey of Texas (Austin, B.C. Jones & co., state printers, 1893)
Cover-title.
At head of title: ... Geological survey of Texas ...
"From fourth annual report, 1892," pt. I.
Keywords: Geology -- Texas; Mines and mineral resources -- Texas