Revision History for USGS Open-File Report 2009-1139 Vladimir I. Berger, Donald A. Singer, and Greta J. Orris Carbonatites of the World, Explored Deposits of Nb and REE; Database and Grade and Tonnage Models ----------------------------------------------------- zipped the FileMaker file so the browser wouldn't try to open the .fp7 July 31, 2009 Minor edits to html page July 30, 2009 Posted online July 29, 2009 -----------------------------------------------------