APRIL 1990 CONFERENCE ON SMOKING + HEALT; BM, BURSON-MARSTELLAR; C+B; EEC; FAO, FOOD AND AGRICULTURE ORG; ILO; INTL SMOKERS CONGRESS; IOCU; ITGA; LATIN AMERICA TOBACCO COUNCIL; LIBERTAD CONFERENCE; MCGILL CONFERENCE; NMA; USCEA; WHA MAY 1990 MEETING; WHO, WORLD HEALTH ORG