Diskusi Panel Manajemen Bioregional Taman Nasional Gunung Gede-Pangrango, Taman Nasional Gunung Halimun, dan Gunung Salak (1996 : Universitas Indonesia)
Regional Meeting on the Creation of a Coordinated System of National Parks and Reserves in Eastern Africa (1974 : Serengeti National Park, Tanzania) (Serengeti National Park)