TY - RPRT TI - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Clays and Clay Products AU - John T. Porter AU - Charles Butts AU - Millard King Shaler AU - J.H. Gardner AU - Jethro Otto Veatch AU - Nevin Melancthon Fenneman AU - George W. Stose AU - Edwin F. Lines AU - William Clifton Phalen AU - Lawrence Martin PY - 1907 DO - 10.3133/b315i UR - https://pubs.usgs.gov/publication/b315I ID - b315I ER -