00322nam a2200097Ia 4500008004100000082001700041100003400058245007100092260005400163300000700217140113s9999    xx            000 0 und d  a631.473   L4  a"Avery, B.W. & Bascomg, C.L."  aSoil Survey Laboratory Methods (Soil Survey technical Monograph 6)  a1974bRothamsted Expt. Stationc"Harpenden, U.K."  a83