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Breeding systems used for cotton at Samaru : paper presented at the West African cotton research conference, Samaru, Zaria, November 1957 / by H.E. King and D.A. Lawes.
- 862.9
- s.n.],
- 1957.
- [S.l. :
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[El Salvador] / Asociación cafetalera de El Salvador.
- s.n.],
- 1957.
- [S.l. :
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[3me Congrès de Pan Indian Ocean scientific association (PIOSA), Tananarive, 1957] / [contrib. par H. Barat...et al.].
- 866
- s.n.],
- 1957.
- [S.l. :