00481nam a2200169Ia 4500008004100000020001500041082001900056100002100075245005800096260004000154300000800194650004100202650003400243653001000277653001200287700001200299170901s1977    xx            000 0 und d  a0471994731  a631.4913bG77S  aGreenland, D. J. 0aSoil Conservation and Management in the Humid Tropics  aNew YorkbJohn Wiley and Sonsc1977  a283  aAgriculture and related technologies  aTechnology (Applied sciences)  aSoils  aTropics  aLal, R.