http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Selection of colors and patterns for geologic maps of the U.S. Geological Survey
12 pages : color illustrations, color maps ; 28 cm.
Also available via Internet from USGS web site. Address as of 9/27/06: http://pubs.usgs.gov/tm/2005/11B01/pdf/TM11-B1.pdf (Report); http://pubs.usgs.gov/tm/2005/11B01/pdf/plate.pdf (Plate); current access available via PURLs.
Includes bibliographical references (page 12).