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2
-
Calculations for Agriculture and Horticulture / Graham Boatfield and Ian Hamilton.
- 635
- Boatfield, Graham.
- Farming Press,
- 1990.
- Ipswich :
-
Farm Crops / Graham Boatfield; Illustrations by Keith Pilling.
- 631.5
- Boatfield, Graham.
- Farming Press,
- 1990.
- Ipswich :