Revision History for Coastal-Change and Glaciological Maps of Antarctica By Richard S. Williams, Jr., Jane G. Ferrigno, and Kevin M. Foley [Supersedes U.S. Geological Survey Fact Sheet 50-98] ----------------------------------------------------- Posted online May 2005 ----------------------------------------------------- Revised 2007 ----------------------------------------------------- Revised 2009 ----------------------------------------------------- Revised September 2011 Minor changes were made to the text and Web links.