Organisation for Economic Co-operation and Development (1987) - UES
IBFD - F/I Reference, L1; binders 1-3 contain country-by-country tax system information; binders 4-6 contain th etext of bilateral tax treaties where at least one African...
Ernst & Young (2003) - UES
Baker, Phillip (2001-) - UES
RIA (1978) - Vol. 20 contains the full text of treaties negotiated by the U.S. and other countries involving income, gift, and estate tax laws - LSF
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.
Oceana (1975 - 1989) - UES; contains English language texts of all tax treaties between two or more nations; the last volume, Vol. 40 of Series B, contains treaties in force...
Vogel, Klaus (1997) - LLES
United Nations (2001) - UES; STA/ESA/PAD/SER.E/21 (pdf, 2001).