Ward, Frank A. Environmental and natural resource economics [Book] / Frank A. Ward. - Upper Saddle River, N.J. : Pearson Prentice Hall, c2006. - xiii, 610 p. : ill. ; 26 cm. All. ISBN: 013113163X (casebound) Subjects--Topical Terms: Environmental economics.Environmental policy.Natural resources. Dewey Class. No.: 333.7