01580nam 2200433Ia 450 991069925030332120230902162022.0(CKB)5470000002401403(OCoLC)477218517(EXLCZ)99547000000240140320091211d2009 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierCarbonatites of the world, explored deposits of Nb and REE--database and grade and tonnage models[electronic resource] /by Vladimir I. Berger, Donald A. Singer, and Greta J. OrrisReston, Va. :U.S. Geological Survey,2009.1 online resource (iii, 17 pages) illustrations, mapOpen-file report ;2009-1139Title from title screen (viewed Sept. 10, 2009).Includes bibliographical references (pages 16-17).U.S. Geological Survey open-file report ;2009-1139.CarbonatitesDatabasesNiobiumDatabasesRare earth metalsDatabasesCarbonatitesNiobiumRare earth metalsBerger Vladimir I1400741Singer D. A1387101Orris G. J1384348Geological Survey (U.S.)GPOGPOBOOK9910699250303321Carbonatites of the world, explored deposits of Nb and REE--database and grade and tonnage models3468217UNINA