An Indexer's Reference Shelf

What follows is one indexer's list of most used reference books (for indexing). There may well be later editions.

Benet’s Reader’s Encyclopedia. Harper & Row, 1987.
Bernstein’s Reverse Dictionary. New York Times Book Co., 1975.
Chicago Manual of Style. 15th ed., University of Chicago Press, 2003.
Merriam Webster’s Biographical Dictionary. Merriam Webster Inc., 1995.
Mulvany, Nancy. Indexing Books. University of Chicago Press, 2005.
Stedman’s Medical Dictionary. 27th Ed. Lippincott, 1999.

Plus a few online sources:

Bartleby.com
Medical Subject Headings Browser
Library of Congress Authorities
Internet Resources

Comments and addenda are welcomed and may be added to a later list unless someone objects.