00506nam a2200169Ia 4500080001800000040001600018021002700034100001900061245013000080260003600210300000900246500001500255650002700270650002100297010000900318010000900327 a502.37 STA co aBIEFCVbPor a(Discussion paper; 13) aStahl, Michael aConstraints to environmental rehabilitation through people's participation in the northern ethiopian highlands/ Michael Stahl aGenebra:bUnited Nations,c1990 a21p. aexemplares aAmbiente-protecção aAmbiente-Etiopia atrue atrue