Version History for:


Langenheim, V.E. Davidson, J.G., Anderson, M.L., and 
     Blank, H.R., Jr., 1999, Principal facts for gravity 
     stations and physical property measurements in the Lake 
     Mead 30' by 60' quadrangle, Nevada and Arizona.

Version 1.0 - October 14, 1999
     First release, on the Web only, at 
     http://wrgis.wr.usgs.gov/open-file/of99-435