Opening Ceremony of the Symposium on Arid Zone Development

1976 ◽  
Vol 29 (5) ◽  
pp. 5
Author(s):  
Roger Revelle
1986 ◽  
Vol 12 (1-2) ◽  
pp. 21-39 ◽  
Author(s):  
Th.M. Boers ◽  
K. Zondervan ◽  
J. Ben-Asher

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