NASA SITES
NASA Thesaurus DESCRIPTION: An electronic version of the NASA Thesaurus.
WEB SITE: http://www.sti.nasa.gov/thesfrm1.htm
Thesaurus for Graphic Materials I: Subject Terms (TGM I) DESCRIPTION: "A thesaurus consisting of 6,204 terms and numerous cross references indexing visual materials. TGM I terms may be searched directly or browsed in alphabetical order."
WEB SITE: http://lcweb.loc.gov/rr/print/tgm1/