00270nam a2200097Ia 4500008004100000082001700041100001400058245003100072260006100103300000800164140113s9999    xx            000 0 und d  a631.417   L2  aAnonymous  aSoils of the Humid Tropics  a1972b"National Academy of Sciences, U.S.A."cWashington  a219