01997oam 2200577 450 991070425650332120160311112006.0(CKB)5470000002439109(OCoLC)885009152(EXLCZ)99547000000243910920140731d1952 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierQuartz crystal deposits of western Arkansas geology of an important domestic source of quartz for optical and oscillator use /by A.E.J. Engel[Washington, D.C.] :United States Department of the Interior, Geological Survey,1952.Washington :United States Government Printing Office.1 online resource (v, 173-260 pages, 25-45 pages of plates) illustrations (some color)Geological Survey bulletin ;973-EContributions to economic geology, 1951Title from title screen (viewed July 21, 2014).Includes bibliographical references (pages 255-258) and index.Quartz crystal deposits of western Arkansas QuartzArkansasGeologyArkansasMines and mineral resourcesArkansasGeologyfastMines and mineral resourcesfastQuartzfastArkansasfastQuartzGeologyMines and mineral resourcesGeology.Mines and mineral resources.Quartz.Engel A. E. J(Albert Edward John),1916-1393421Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOOCLCQGPOBOOK9910704256503321Quartz crystal deposits of western Arkansas3449553UNINA