http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geologic map of the northern plains of Mars
National Aeronautics and Space Administration.
1 electronic map : HTML, digital, PDF file.
by Kenneth L. Tanaka, James A. Skinner, Jr., and Trent M. Hare ; prepared for the National Aeronautics and Space Administration.
Coordinates shown in 2 schemes, planetocentric and planetographic.
Includes text, ancillary maps, and chart.
Mode of access: Internet from the USGS web site. Address as of 4/14/08: http://pubs.usgs.gov/sim/2005/2888/ ; current access via PURL.
Includes bibliographic references (pages 19-25 of pamphlet).