Suggested citation and version history for Campbell, Russell H., McCulloh, Thane H., and Vedder, John G., 2007, revised 2009, The Miocene Topanga Group of southern California; a 100; year history of changes in stratigraphic nomenclature: U.S. Geological Survey Open-File Report 2007-1385, v. 1.1, 36 p. [http://pubs.usgs.gov/of/2007/1385/]. Version 1.1 November 30, 2009 Revised the Introduction, Summary, Acknowledgments, and References. Made significant revisions and additions to the Chronology of Usage section. Version 1.0 January 9, 2008 Initial release online at http://pubs.usgs.gov/of/2007/1385/