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2
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Demographic aspects of manpower in Arab countries / [publ. by the Cairo demographic centre].
- C.D.C.,
- 1972.
- Cairo :
-
Anhydrous ammonia for field crops : an evaluation of anhydrous ammonia as a nitrogen supply for cotton, corn, rice and wheat / M.T. Eid.
- 861.6
- General organization for agricultural crops equilization fund,
- 1972.
- Cairo :