00359nam a2200133Ia 4500008004100000082001800041100002700059245002700086260002600113300001000139600002700149600002700176650002200203140113s9999    xx            000 0 und d  a631.417  K7.1  a" McLaren, A. Douglas"  aSoil biochemistry v. 1  b"Edward Arnold, 1967"  a509p.  a" Peterson, George H."  a" Peterson, George H."  aBiochemistry-Soil