02270oam 2200577 450 991070423050332120160311172650.0(CKB)5470000002439372(OCoLC)885009247(EXLCZ)99547000000243937220140731d1953 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierGeologic investigation of the Boyertown magnetite deposits in Pennsylvania /by H.E. Hawkes, Helmuth Wedow, and J.R. Balsley[Washington, D.C.] :United States Department of the Interior, Geological Survey,1953.Washington :United States Government Printing Office.1 online resource (iii, 135-149 pages, 5 unnumbered pages of plates) illustrations (some color)Geological Survey bulletin ;995-DContributions to economic geologyTitle from title screen (viewed July 21, 2014).Additional title page description: "With a section on land and airborne magnetic surveys in the vicinity of Boyertown, Berks County, Pennsylvania."Includes bibliographical references (page 148) and index.Contributions to economic geology, geologic investigation of Boyertown magnetite depositsMagnetitePennsylvaniaBoyertownMines and mineral resourcesPennsylvaniaBoyertownMagnetitefastMines and mineral resourcesfastPennsylvaniafastPennsylvaniaBoyertown RegionfastMagnetiteMines and mineral resourcesMagnetite.Mines and mineral resources.Hawkes H. E(Herbert Edwin),1912-1996,1398387Wedow Helmuth1917-Balsley J. R.Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOOCLCQGPOBOOK9910704230503321Geologic investigation of the Boyertown magnetite deposits in Pennsylvania3461530UNINA