Mode of access: Internet from the USGS web site. Address as of 3/17/08: http://pubs.usgs.gov/of/2007/1177/start.html ; current access via PURL. System requirements: PC with Internet access and Adobe Acrobat Reader or similar software to handle .pdf (Portable Document Format) file.
Title from HTML index page (viewed on Feb. 28, 2008). Includes interactive index of quadrangles covered. Relief shown by contours and spot heights.