Suggested citation and version history for Thomas, Kathryn A., and Guertin, Patricia, 2007, Southwest Exotic Mapping Program 2007; occurrence summary and maps of select invasive, non-native plants in Arizona: U.S. Geological Survey Open-File Report 2007-1277, 76 p. [http://pubs.usgs.gov/of/2007/1277/]. Version 1.1 January 24, 2008 Page 4, line 3: 30 minute topographic quadrangles were used instead of the reported 7.5 minute topographic quads. Page 6, line 13: 30 minute topographic quadrangles were used instead of the reported 7.5 minute topographic quads. Pages 15 Ð 75, left bottom corner map: caption reads "SWEMP occurrence records by 7.5" Topographic Quadrangles", caption should read "SWEMP occurrence records by 30' Topographic Quadrangles". Version 1.0 November 21, 2007 Initial release online at http://pubs.usgs.gov/of/2007/1277/