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1
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2Texto bibliotecaFAO IT
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3by Grolier, M.J., Geological Survey, Washington, DC (USA) eng, Tibbitts, G.C., Ibrahim, M.M.
Published 1984Texto bibliotecaFAO IT -
4by FAO, Rome (Italy). Forestry Dept. eng, European Commission, Brussels (Belgium) eng, Geological Survey, Washington, DC (USA) eng
Published 2011Texto bibliotecaFAO IT