00310nam a2200097Ia 4500008004100000082001600041100002100057245004400078260008200122300000800204140113s9999    xx            000 0 und d  a631.42   J6  a"Jackson, M. L."  aSoil Chemical Analysis -Advanced Course  a1956b"M.L.Jackson, Dept.o Soil Sci.Univ. of Wisconsin"c"Madeson, Wisconsin"  a894