00632nam a22001937a 4500 110104t xxu||||| |||| 00| 0 eng d 1853830526 97881853830525 21 333.73 Dixon, John A. [et al.] 13049 The Economics of DryLand Management/ John A. Dixon, David E. James, and Paul B. Sherman London: Earthscan Publication, c1989. ix,302p.: ill.; includes reference and index dryland,management,economics 13051 James, David E. 13053 Sherman, Paul B. 13054 ddc BK 7115 7115