00290nam a2200097Ia 4500008004100000082003100041100000900072245008000081260002300161300000800184140113s9999    xx            000 0 und d  a631.86:621.039(082.2)   K8  aIAEA  aIsotopes and radiations in soil organic matter studies (proceedings series)  a1968bIAEAcVienna  a584