4 unnumbered pages : color illustrations, maps ; 28 cm
OCLC
ocm37453885
Caption title.
Shipping list no.: 1997-0319-P.
Also available via Internet from the USGS Web site. Address as of 12/15/04: http://water.usgs.gov/pubs/fs/FS-027-96/fs-027-96.pdf; current access available via PURL.