Preliminary report on the iron ores and coal fields from the field work of 1872
Missouri. Geological Survey; Pumpelly, Raphael, 1837-1923; Chauvenet, Regis, b. 1842; Blair, Andrew Alexander, 1848-1932; Schmidt, Adolf; Broadhead, Garland C. (Garland Carr), 1827-1912; Potter, William Bleecker, 1846-1914; Smith, Charles A; Norwood, Charles Joseph, b. 1853