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The wild and cultivated cotton plants of the world : a revision of the genus Gossypium framed primarily with the object of aiding planters and investigators who may contemplate the systematic improvement of the cotton staple / by George Watt.
- Longmans, Green,
- 1907.
- London [etc.] :
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Plant-breeding : comments on the experiments of Nilsson and Burbank / by Hugo de Vries.
- Kegan Paul, Trench, Trübner [etc.],
- 1907.
- London [etc.] :