Revision History for USGS Scientific Investigations Report 2012-5276 Margot Truini Preliminary Hydrogeologic Assessment near Tassi and Pakoon Springs, Western Part of Grand Canyon-Parashant National Monument, Arizona ----------------------------------------------------- Fixed errors on table 1 and figure 4 March 29, 2013 Posted online at http://pubs.usgs.gov/sir/2012/5276/ January 24, 2013 -----------------------------------------------------