U.S. Customs Court - Lexis: CUSTCT (1937-1980)
ed. by Luigi Bernardi (2008) - UES
Lexis: SATC (1920-1998); not currently updated; contains decisions from the Supreme Court of South Africa, and the High and Supreme Courts of Zimbabwe.
Smith, David B. - The Institute of Economic Affairs (2006) - UES
U.S. Court of Internatioanl Trade - Lexis: USCIT (1980-current)
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.