White, I. D. Environmental systems : an introductory text / I.D. White, D.N. Mottershead, S.J. Harrison. - 2nd ed. - London ; New York : Chapman & Hall, 1992. - x, 616 p. : ill., maps ; ISBN: 041247140X Subjects--Topical Terms: Physical geography.Natural history. LC Class. No.: GB54.5 / .W48 1992