Geochemical landscapes of the conterminous United States : new map presentations for 22 elements /
Gustavsson, N.
Geological Survey (U.S.)
Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey : Branch of Information Services, [distributor,
2001]
"First printing November 2001"--T.p. verso.
Shipping list no.: 2002-0102-P.
Includes bibliographical references (p. 36-38).
Soils
Also available via Internet from the USGS Web site (PDF file). Address as of 2-14-02: http://geology.cr.usgs.gov/pub/ppapers/p1648/p1648.pdf; current access is available via PURL.