The use of isotopes in soil organic matter studies; report of the FAO/IAEA Technical Meeting. Technical Meeting on the Use of Isotopes in Soil Organic Matter Studies, Brunswick, 1963. [from old catalog] Food and Agriculture Organization of the United Nations. Humus Congresses. Soils Research Congresses. Radioisotopes Congresses. S590 .T4 1963c 631.417 FO21 Oxford, New York, Symposium Publications Division, Pergamon Press [1965] [1965] 1965 Text xix, 507 p. eng