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1by Travaglia, C., FAO, Rome (Italy). Agricultural Operations Div. eng, Baes, A.F., Tomas, L.M., Bureau of Soils, Manila (Philippines) eng
Published AprTexto bibliotecaFAO IT -
2by Travaglia, C., FAO, Rome (Italy). Agricultural Operations Div. eng, Baes, A.F., Hernandez, F.L., Ventura, O.O., Ministry of Agriculture, Quezon City (Philippines). Bureau of Soils eng
Published AprTexto bibliotecaFAO IT