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3Texto bibliotecaFAO IT
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4Digital revistaSCIELO
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5by Smith, R.B., Joint FAO/ECE/ILO Committee on Forest Working Techniques and Training of Forest Workers, Geneva (Switzerland) eng, Seminar on the Impact of Mechanization of Forest Operations on the Soil eng 11-15 Sep 1989 Louvain-la-Neuve (Belgium), Krag, R.K., Senyk, J.P.
Published MayTexto bibliotecaFAO IT