01142nam 2200349 450 991070361530332120150414114749.0(CKB)5470000002433562(OCoLC)907295450(EXLCZ)99547000000243356220150414d1998 ua 0engurmn|||||||||rdacontentrdamediardacarrierRevised grade and tonnage model of carbonatite deposits /by Donald A. SingerMenlo Park, CA :U.S. Department of the Interior, U.S. Geological Survey,1998.1 online resource (7 pages) illustrationsOpen-file report ;98-235Title from title screen (viewed April 13, 2015).Includes bibliographical references (pages 1-3).CarbonatitesCarbonatites.Singer D. A.1387101Geological Survey (U.S.),GPOGPOBOOK9910703615303321Revised grade and tonnage model of carbonatite deposits3471372UNINA