Revision History for Open-File Report 2012-1273 Thomas R. Yager, Yadira Soto-Viruet, and James J. Barry Recent Strikes in South Africa’s Platinum-Group Metal Mines—Effects Upon World Platinum-Group Metal Supplies ----------------------------------------------------- Posted online December 21, 2012 ----------------------------------------------------- Revised and reposted September 6, 2013 This revision of Open-File Report 2012–1273 incorporates the following changes: (1) New paragraph inserted after the third complete paragraph on page 4. (2) New reference for Johnson Matthey Plc, 2013, added to the References Cited list.