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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

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92-3-201484-X


Arid lands
Semi-arid lands

333.73 / U3d
Last Updated on June 15, 2020
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