Symposium international sur l’action a long terme des défoliants au Viet Nam (Ho Chi Minh City, 13-19 January 1983). The proceedings will be published by SIPRI (Stockholm International Peace Research Institute). Symposium on Krakatau. To commemorate the 1883 Krakatau eruption the Indonesian Institute of Sciences (LIPI) organised various activities including the ’Symposium on the 100th year development of Krakatau and its surroundings’ on 23-27 August 1983 in Jakarta. Aspects of geology, biology, oceanography and sociology, history of conservation, and remote sensing were discussed in 10 papers on flora, vegetation and phytogeography on the islands and surrounding areas. It is hoped that the proceedings will be published in 1984. Over a hundred participants from Indonesia and abroad attended. See also the interim report on the research by a number of Japanese biologists published by H. Tagawa (see Review on page 74 and Bibliography).