Suggested citation and version history for:  


  Patton, William W., Jr., Wilson, Fredric H, Labay, 
       Keith A., and Shew, Nora, 2009, Geologic map of the 
       Yukon-Koyukuk Basin, Alaska:  U.S. Geological Survey 
       Scientific Investigations Map 2909, scale 1:500,000, 
       2 sheets and pamphlet 
       [http://pubs.usgs.gov/sim/2909/].


  Version 1.0

  May 5, 2009
  Added link to digital data in USGS Open-File Report 2005-1341

  April 2009
  Initial release in print form and online at
  http://pubs.usgs.gov/sim/2909/