Mammoth mine / U. S. National Museum / Higgins mine / /
IndustryTerm
chemical composition / metal ion / energy considerationsthat / metal ions / chemical analysis / /
Person
Howard T. Evans / Jr. / Frank Cuttitta / Bradley / Arthur L. Flagg / H. T. Evans Jr. / Foa / CRYSTAL STRUCTURE / Clark / CRYSTAL STRUCTURE OF MURDOCHITE / Joseph M. Axelrod / Kasper / W. F. Foshag / Jay / George Switzer / Fred A. Hildebrand / Christ / / /
Position
miner / mining engineer / rt / Director / U. S. Geological Survey / /