1. The crystalline rocks of the Northwest Author(s): Winchell, N. H. (Newton Horace), 1839-1914, author Publication: [Philadelphia?] : [publisher not identified], [1884?] Subject(s): Geological PhenomenaMidwestern United States
2. The St. Peter's sandstone Author(s): James, Joseph F. (Joseph Francis), 1857-1897 author Publication: [Cincinnati?] : [publisher not identified], [1894?] Subject(s): Geological PhenomenaMidwestern United States