Louisville, Ky. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor], 2002
iv, 35 pages : illustrations, maps (1 folded) ; 28 cm
OCLC
ocm50900519
Includes bibliographical references (pages 18-20).
Also available via Internet at the USGS web site. Address as of 9/15/09: http://ky.water.usgs.gov/pubs/wrir_2002_4206.pdf; current access available via PURL.