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Effects of environment and cultural conditions on potassium, calcium and magnesium in coffee leaves / by J.B.D. Robinson.
- 864.5
- s.n.],
- 1969.
- [S.l. :
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Early maturity sprays of arsenate compounds on grapefruit and carry-over effects / by J.M. del Rivero, P. Veyrat and D. Gomez de Barreda.
- 847.1
- s.n.],
- 1969.
- [S.l. :
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Improving fruit set in Clementine mandarin with chemical treatments in Spain / by J.M. del Rivero, P. Veyrat and D. Gomez de Barreda.
- 847.1
- s.n.],
- 1969.
- [S.l. :