Arid zone development: Potentialities and problems Edited by Y. Mundlak and S. F. Singer. Ballinger Publishing Company, Camrridge, Massachusetts. pp. 293

1978 ◽  
Vol 12 (2) ◽  
pp. 136
Author(s):  
D Van der Merwe
1986 ◽  
Vol 12 (1-2) ◽  
pp. 21-39 ◽  
Author(s):  
Th.M. Boers ◽  
K. Zondervan ◽  
J. Ben-Asher

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