Catalogue of the Geological Museum - Hall, Charles E. 1852-1908; D'Invilliers, Edward V. 1857-1928; Lewis, Henry Carvill 1853-1888; Randall, F. A.; Carll, John Franklin 1828-1904; Genth, Frederick Augustus 1820-1893; Mansfield, I. F.; Lesquereux, Leo 1806-1889; Simpson, George B. (Board of Commissioners for the Second Geological Survey of Pennsylvania, 1889)