Description
Item Description:Relief shown by contours and shading.
Title from HTML start page (viewed on Mar. 17, 2008).
Includes interactive index of quadrangles covered.
Electronic resource.
Physical Description:30 maps : HTML, digital, PDF file.
Format:Mode of access: Internet from the USGS web site. Address as of 3/17/08: http://pubs.usgs.gov/of/2007/1377/start.html ; current access via PURL.