iii, 135 leaves : illustrations, maps (some color) ; 28 cm.
General Note:
Cover title. Shipping list no.: 2000-0894-M.
Additional Physical Form:
Also available via Internet from the USGS web site. Address as of 9-25-00: http://greenwood.cr.usgs.gov/pub/open-file-reports /ofr97-0151/ ; current access is available via PURL.