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1Soil conservation: problems and prospects; (proceedings of conservation 80, the International Conference on Soil Conservation, held at the National College of Agricultural Engineer... Soil conservation: problems and prospects; (proceedings of conservation 80, the International Conference on Soil Conservation, held at the National College of Agricultural Engineer...by Morgan, R.P.C. (ed.), International Conference on Soil Conservation eng 21-25 Jul 1980 Silsoe (UK)
Published 1981Texto bibliotecaFAO IT