In addition to various books and articles about federal Indian law and tribal law, the library staff also consulted the following materials related to subject headings and thesauri:

Aitchison, Jean and Alan Gilchrist. 1987. Thesaurus Construction : A Practical Manual. London: Aslib.

Chan, Lois Mai (prepared for the Library of Congress). 1990. Library of Congress Subject Headings: Principles of Structure and Policies for Application. Washington D.C. : Library of Congress.

Eman, Jay Ven. 2003. "Taxonomies for Indexing." 2003 Virtual Seminar Series presented by SLA's [Special Libraries Association] Professional Development Team in Partnership with Information Outlook.

Library of Congress. Library of Congress Subject Headings. Washington D.C.: Library of Congress. Access online at http://authorities.loc.gov/webvoy.htm.

Maxwell, Robert L. 2002. Maxwell's Guide to Authority Work. Chicago: American Library Association.

National Information Standards Organization. 1993. Guidelines for the Construction, Format, and Management of Monolingual Thesauri. Maryland: NISO Press. (NISO standards: http://128.8.237.133/standards/index.html)

Studwell, William E. 1990. Library of Congress Subject Headings: Philosophy, Practice, and Prospects. New York: Haworth Press.

West's Analysis of American Law, 2003 Edition: Guide to the American Digest System, With Key Number Classifications. 2002. Minnesota : West Group.