  U.S. Geological Survey, Digital Spectral Library: Version 6 

      Roger N. Clark, Gregg A. Swayze, Richard Wise 
K. Eric Livo, Todd M. Hoefen, Raymond Kokaly, and Steve J, Sutley 

             U.S. Geological Survey, MS 964 
                Box 25046 Federal Center 
                 Denver, CO 80225-0046 
                    (303) 236-1332 



rclark@usgs.gov 

http://speclab.cr.usgs.gov 

