Publication Date Link 1972 Special Issue XVII Congress Material 1972 February-March 1974 Information Bulletin February-March 1974 January-February 1976 Information Bulletin January-February 1976 April-May 1978 Information Bulletin April-May 1978 February 1980 Information Bulletin February 1980 March 1980 Information Bulletin March 1980 December 1980 Information Bulletin December 1980 March 1981 Information Bulletin March 1981 April-May 1981 Information Bulletin April-May 1981 June 1981 Information Bulletin June 1981 July August 1981 Information Bulletin July August 1981 April-May 1981 Information Bulletin April-May 1981 July-August 1981 Information Bulletin July-August 1981 December 1981 Information Bulletin December 1981 June 1982 Information Bulletin Special Issue June 1982 August-September 1982 Information Bulletin August-September 1982 January-February 1983 Information Bulletin January-February 1983 July-August 1983 Information Bulletin July-August 1983 January 1984 Information Bulletin January 1984 March-April 1984 Information Bulletin March - April 1984 June-July 1984 Information Bulletin June-July 1984 July-August 1984 Information Bulletin July-August 1984 September-October 1984 Information Bulletin September-October 1984 January 1985 Information Bulletin January 1985 February 1985 Information Bulletin Special Issue February 1985 March 1985 Information Bulletin March 1985 November-December 1985 Information Bulletin November-December 1985 November-December 1986 Information Bulletin November-December 1986 January-February 1987 Information Bulletin January-February 1987 March/April 1988 Information Bulletin March-April 1988 December 1988 Information Bulletin December 1988 February/March 1989 Information Bulletin February 1989 December 1989 Information Bulletin December 1989 January/February 1990 Information Bulletin January 1990 May/June 1991 Information Bulletin May-June 1991
