Unknown

LOEW, OSCAR, AND ROESSLER, A.R., 1873, EXPLORATION OF THE NORTHWEST PART OF TEXAS IN 1872: PETERMANN'S ...MITTHEILUNGEN AUS JUSTUS PERTHES GEOGRAPHISCHER ANSTALT... (GOTHA), V. 19, P. 453-467 (P. 466).FURMAN, J.H., 1881, NEW YORK ACADEMY OF SCIENCES, TRANSACTIONS, V. 1, P. 15-20 (P. 16, MAP).PHILLIPS, W.B., 1914, TEXAS BUREAU OF ECONOMIC GEOLOGY, TEXAS UNIVERSITY BULLETIN 365, SCIENTIFIC SERIES 29, OCT. 15, 1914, 362 P.