http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 portfolio (16 items (some folded)) : illustrations (some color), maps (some color) ; 31 cm.
Also available via Internet from USGS web site. Address as of 6/4/07: http://erg.usgs.gov/isb/pubs/teachers-packets/mapshow/mapshowindexpdf.html; current access available via PURL.