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Halving hunger : it can be done
lead authors Pedro Sanchez, coordinator ....
Bok Engelsk 2005
Replenishing soil fertility in Africa
Buresh, Roland J.
Bok Engelsk 1997
Multiple cropping : proceedings of a symposium
sponsored by Divisions A-6, S-4, S-6, A-3...
Bok Engelsk 1976
Properties and management of soils in the tropics
Pedro A. Sanchez
Bok Engelsk 1976