Version history for Hayward, R.K., Mullins, K.F., Fenton, L.K., Hare, T.M., Titus, T.N., Bourke, M.C., Colaprete, A., and Christensen, P.R., 2007 Mars Global Digital Dune Database: MC2 - MC29: U.S. Geological Survey Open- File Report 2007-1158. [http://pubs.usgs.gov/of/2007/1158/]. Version 1.0, June 19, 2007 Initial release online at http://pubs.usgs.gov/of/2007/1158/