00253nam a2200097Ia 4500008004100000082001900041100002400060245002900084260003300113300000900146140113s9999    xx            000 0 und d  a631.4(02)   N9  a"Summer, M.E., Ed."  aHandbook of Soil Sceince  a1999bCRC Press cBoca Raton  a2137