a state-of-knowledge report Unesco creator United Nations Environment Programme Food and Agriculture Organization of the United Nations text Paris Unesco c1979 monographic 655 p. : ill. ; 27 cm. prepared by Unesco, UNEP, FAO. Includes bibliographies. w------ Rangelands Tropics Range ecology Tropics Range management Tropics Grazing Tropics Human ecology Tropics SD567.G8 T7 1979 574.5/2643/0913 9231016113 (pbk.) 80499801 UOEL 000 20150603122138.0 000