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4
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A hand-operated bast fibre ribboner / J.H. Beaumont.
- Tropical products institute,
- 1979.
- London :
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A hand-operated disc mill for decorticating sunflower seed / J.H. Beaumont.
- Tropical products institute,
- 1981.
- London :
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A hand-operated bar mill for decorticating sunflower seed / J.H. Beaumont.
- Tropical products institute,
- 1981.
- London :
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A hand-operated winnower / J.H. Beaumont.
- Tropical products institute,
- 1981.
- London :