Digital mapping techniques '06--workshop proceedings, June11--14, 2006 Columbus, Ohio. 

 - Washington, D.C. :  U.S. Dept. of the Interior, U.S. Geological Survey.  2007. 
 - 217 p. :  book 
 - U.S. Geological Survey open-file report  2007-1285 .
<br/><br/> "Association of American State Geologists and the United States Geological Survey."  "Hosted by the Ohio Geologial Survey."  CRDP Program Historic Shelflist record. 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.76:2007-1285