00310nam a2200097Ia 4500008004100000082002000041100004600061245005800107260004000165300000700205140113s9999    xx            000 0 und d  a543[631.4]   K8  a"Beaton, J.D., Burns, G.R. & Platore, J."  aDetermination of sulphur in soils and plant materials  a1968bSulphur InstitutecWashington  a56