Chiras, Daniel D. Natural resource conservation : management for a sustainable future / Daniel D. Chiras, John P. Reganold. - 9th ed. - Upper Saddle River, NJ : Prentice Hall, 2005. - xii, 644 p. ISBN: 0131458329 : GBP 69.99 Subjects--Topical Terms: Conservation of natural resources. LC Class. No.: S938 / .C45 2005