United Nations Commission on International Trade Law (UNCITRAL) Yearbook 1991 Series: United Nations Commission on International Trade Law (UNCITRAL) Yearbook 22 Jan 1993
United Nations Commission on International Trade Law (UNCITRAL) Yearbook 1990 Series: United Nations Commission on International Trade Law (UNCITRAL) Yearbook 12 Jun 1992
United Nations Commission on International Trade Law (UNCITRAL) Yearbook 1989 Series: United Nations Commission on International Trade Law (UNCITRAL) Yearbook 11 Feb 1991