TY - RPRT TI - Contributions to economic geology, 1912; Part I, Metals and nonmetals except fuels--Structural Materials AU - Clyde Maxwell Bauer AU - Robert Wallace Pack AU - J. F. Hunter PY - 1914 DO - 10.3133/b540k UR - https://pubs.usgs.gov/publication/b540K ID - b540K ER -