http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Aeronautics and Space Administration.
Also available via Internet from the NASA web site. Address as of 1/14/04: http://www2.sti.nasa.gov/Webtop/ws/asdb/u/web/ImageDisplay?secure=false&docid=1993002692&type=pdf&daa=; current access available via PURL.
Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1992] 1 microfiche.
Report to the nation on our changing planet ; winter 1991, no. 1