Version history for


  Langenheim, V.E., Hildenbrand, T.G., Jachens, R.C., 
       Campbell, R.H., and Yerkes, R.F., 2006, Aeromagnetic 
       map with geology of the Los Angeles 30 x 60 minute 
       quadrangle, southern California:  U.S. Geological 
       Survey Scientific Investigations Map 2950 [available 
       on the World Wide Web at URL 
       http://pubs.usgs.gov/sim/2006/2950/ ].


  Version 1.0, October 23, 2006

  Initial release online at
  http://pubs.usgs.gov/sim/2006/2950/

  1997

  Earlier map released in paper form as U.S. Geological 
  Survey Open-File Report 97-162 which has been superceded 
  by Scientific Investigations Map 2950