Development of Arid and Semi-Arid Lands : obstacles and prospects /
- Paris : UNESCO, c 1977.
- 42 p. ; 28 cm.
- MAB Technical Notes-6 .
Bibliography : p. 40-42
323 323
92-3-201484-X
Arid lands
Semi-arid lands
333.73 / U3d
Bibliography : p. 40-42
323 323
92-3-201484-X
Arid lands
Semi-arid lands
333.73 / U3d