http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Recovery of byproduct heavy minerals from sand and gravel operations in Oregon and Washington
14 pages : illustrations, 1 map ; 27 cm.
by G.M. Martinez, J.M. Gomes, and M.M. Wong.
Report of investigations (United States. Bureau of Mines) ; 8563