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2
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The geography of tropical African development / A.M. O'Connor.
- 860.1
- Pergamon,
- 1971.
- Oxford [etc.] :
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Water use by irrigated cotton in Sudan : III: Bowen ratios and advective energy / by D.A. Rijks.
- 864.1
- Blackwell Scientific Publications,
- 1971.
- Oxford [etc.] :