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2
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The role of agriculture in economic development : a case study of Pakistan / Mahmood Hasan Khan ; forew. by Colin Clark.
- 856.2
- Centre for agricultural publications and documentation (PUDOC),
- 1966.
- Wageningen :
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Observations on the population dynamics of the red locust, Nomadacris septemfasciata (Serville), in its outbreak areas / C.W. Stortenbeker.
- 860.1
- Centre for agricultural publications and documentation (PUDOC),
- 1967.
- Wageningen :