Údar
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- ebrary, Inc 6 toradh
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- Filson, Glen C., 1947- 2 toradh
- Howeler, R. H. 2 toradh
- Lutaladio, NeBambi 2 toradh
- National Research Council (U.S.). Committee on Sustainable Agriculture and the Environment in the Humid Tropics 2 toradh
- National Research Council (U.S.). Committee on Twenty-First Century Systems Agriculture 2 toradh
- Thomas, Graeme 2 toradh
- editedGonsalves, Julian 2 toradh