Research procedure and experimental design for savanna ecology and management : report of a Meeting of an IUBS Working Group Decade of the Tropics Programme on Tropical Savanna Ecosystems co-sponsored by the Director of the International Relation and Co-operation (DRCI) and the Interdisciplinary Research Programme on the Environment (PIREN) of the French National Centre for Scientific Research, The International Union of Biological Sciences (IUBS) andthe Unesco Man and the Biosphere Programme - Walker, B. H.; Menaut, Jean-Claude (Responses of savannas to stress and disturbance, 1988)