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1Published 1968Trivandrum : Bureau of Economics and Statistics, Kerala State, 1968.31, 3, [8] p. ; 35 cm.Subjects: “...Soil conservation Economic aspects India Kerala....”
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2by Erenstein, Olaf
Published 1999[Wageningen : Wageningen University], c1999.x, 301 p. : ill., map ; 24 cm.Subjects: “...Soil conservation Economic aspects Developing countries....”
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3by Graaff, J. de
Published 1996Wageningen, Netherlands : Wageningen Agricultural University, [1996?]xii, 298 p. : ill., maps ; 24 cm.Subjects: “...Soil conservation Economic aspects....”
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4by Elliott, Jennifer A.
Published 19891989.4 microfiches.Subjects: “...Soil conservation Economic aspects Zimbabwe....”