%0 U.S. Federal Government Document %0 Print %0 Book %A Wright, Clarence A. %E Missouri. Bureau of Geology and Mines %I U.S. G.P.O. %D 1918 %C Washington %G English %B Bulletin (United States. Bureau of Mines) %T Mining and milling of lead and zinc ores in the Missouri-Kansas-Oklahoma zinc district %7 Array