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1Digital revistaSCIELO
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2Brief bibliotecaBanco Mundial
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3by Le Duy Thuoc, FAO, Rome (Italy). Agriculture Dept. eng, National Workshop on Investigations of Lands with Declining and Stagnating Productivity eng 12-23 Oct 1985 Hanoi (Viet Nam), Ministry of Agriculture, Hanoi (Viet Nam). National Inst. for Agricultural Planning and Projection eng
Published 1986Texto bibliotecaFAO IT -
4by Do Dinh Thuan, FAO, Rome (Italy). Agriculture Dept. eng, National Workshop on Investigations of Lands with Declining and Stagnating Productivity eng 12-23 Oct 1985 Hanoi (Viet Nam), Le Duy Mi (Ministry of Agriculture, Hanoi (Viet Nam). Research Inst. for Soil Science and Fertilizers), Ministry of Agriculture, Hanoi (Viet Nam). National Inst. for Agricultural Planning and Projection eng
Published 1986Texto bibliotecaFAO IT