Open access website contains bilateral treaties between the U.S. and foreign jurisdictions (in pdf).
RIA - Westlaw: RIA-TREATIES (current) - treaties between the U.S. and others with legislative histories and editorial explanations (combination of RIA International Tax...
ed. by Jennifer Johnson-Calari & Malan Rietveld (2007) - UES
Smith, David B. - The Institute of Economic Affairs (2006) - UES
Thompson, Samuel C. (2007) - L4
Oceana (1976-1989) - UES; contains English language texts of all tax treaties between two or more nations; there is also a combined index for Series A and B.
Creedy, John and Cath Sleeman (2006) - UES
Office of the Legal Advisor, U.S. Department of State, Treaty Affairs Staff. This publication lists bilateral and multilateral treaties and other international agreements of...
ed. by Luigi Bernardi, Angela Fraschini, and Parthasarathi Shome (2006) - UES