4 unnumbered pages : color illustrations, maps (some color) ; 28 cm
OCLC
ocm42670899
Caption title.
Shipping list no.: 99-0374-P.
"August 1999"--P. [1].
Also available via Internet from the USGS web site. Address as of 10/20/99: http://water.usgs.gov/pubs/FS/FS-037-99/; current access is available via PURL.