Lee, Sergio J., Environmental Science the economy of nature and ecology of man/ Sergio J. Lee - Metro Manila: Knowledge Educational Supply, 1997. - 246 pages: figures, tables; 25 cm. Includes Bibliography pages (245-246). ISBN: 9718901017 Subjects--Topical Terms: Environmental Sciences.Earth Sciences.Ecology. Dewey Class. No.: 363.7 / L510e