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Databas of USGS Map I-1970, map showing the thickness and character of Quaternary sediments in the g

Soller, D. R. (David R.)
[Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey, 2012. 2012

Database of the geologic map of North America, adopted from the map by J.C. Reed, Jr. and others (20

Garrity, Christopher P.
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2009. 2009

Database of the geologic map of North America, adopted from the map by J.C. Reed, Jr. and others (20

Garrity, Christopher P.
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2009. 2009

Digital mapping techniques '06, workshop proceedings : June 11-14, 2006, Columbus, Ohio

Digital Mapping Techniques Workshop (2006 : Columbus, Ohio)
[Reston, Va.] : U.S. Geological Survey, 2007. 2007

Digital mapping techniques '98 workshop proceedings : May 27-30, 1998, Champaign, Illinois

Digital Mapping Techniques Workshop (1998 : Champaign, Ill.)
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, CO : Branch of Information Services, distributor], 1998. 1998

Digital representation of a map showing the thickness and character of Quaternary sediments in the g

Geological Survey (U.S.)
[Reston, VA] : The Survey ; [Denver, CO : For sale by the Survey], 1998. 1998

Preliminary digital Quaternary geologic map data for Indiana

Soller, D. R. (David R.)
Reston, VA : U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1993. 1993