TY - BOOK TI - Digital mapping techniques '06--workshop proceedings, June11--14, 2006 Columbus, Ohio T2 - U.S. Geological Survey open-file report PY - 2007/// CY - Washington, D.C. PB - U.S. Dept. of the Interior, U.S. Geological Survey. N1 - "Association of American State Geologists and the United States Geological Survey."; "Hosted by the Ohio Geologial Survey."; CRDP Program Historic Shelflist record ER -