Title:
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Isotope studies on the nitrogen chain : proceedings of the Symposium on the Use of Isotopes in Studies of Nitrogen Metabolism in the Soil-Plant-Animal System / jointly organized by the International Atomic Energy Agency and the Food and Agriculture Organization of the United Nations in co-operation with the Joint Commission on Applied Radioactivity (ICSU) and held in Vienna, 28 August - 1 September 1967.
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