Fourth symposium on our environment : proceedings of the fourth symposium on our environment, held in Singapore, May 21-23, 1990 - Symposium on Our Environment 1990 : Singapore); Hian Kee Lee; Lee, Hian Kee (Dordrecht Kluwer Academic Publishers, 1991)
Keywords: Environmental protection -- Asia -- Congresses; Environmental protection -- Pacific Area -- Congresses; Pollution -- Measurement -- Congresses