A. Texts:
Taylor, Arlene G. (2004) The Organization of Information. 2nd edition. Libraries Unlimited, Englewood, Colo.
Anderson, James D. (1997) Guidelines for Indexes and Related Information Retrieval Devices. National Information Standard Organization (NISO) Technical Report 2. Bethesda, MD: NISO Press. Available from http://www.niso.org/standards/std_resources.html
Wellisch, Hans H. (1995) Indexing from A to Z. Second edition. New York: H. W. Wilson.

(Required readings will be available from the website except those from the Taylor book).

B. Additional readings:
The Taylor and Anderson books each contain extensive bibliographies.