Copyright Handbook: What Every Writer Needs to Know, by Stephen Fishman. REFERENCE KF2995 .F53 2014.
Collection of National Copyright Laws — Provides national copyright and related rights legislation of UNESCO (United Nations Educational, Scientific and Cultural Organization) Member States.
Cornell University Copyright Information Center
Copyright Term and the Public Domain in the United States
U.S. Copyright Office Fair Use Index — for a full description of the index, see copyright.gov.
Westlaw's copyright fair use factor evaluator — "A tool to help litigators navigate caselaw on balancing tests quickly, accurately, and easily."
Stanford's Copyright & Fair Use pages — A collection of various copyright resources.
Cornell's Copyright Information Center — Tailored to the Cornell community but has utility to others as well, includes checklists, decision trees, and more.