http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
2 volumes : illustrations, maps ; 28 cm.
Also available via Internet from the CENSUS web site (PDF files). Address as of 02/16/01: http://www.census.gov/prod/cen1990/ch2/ch-2-45-1.pdf (Sect. 1) and http://www.census.gov/prod/cen1990/ch2/ch-2-45-2.pdf (Sect. 2); current access is available via PURL.
Includes bibliographical references (sec. 2, p. F-4 - F-5).