%O Book %T A Guide to the Use of Nitrogen-15 and Radioisotopes in the Studies of Plant Nutrition: Calculations and Interpretation of Data %A %U http://www.dgdingfa.net/publications/540/a-guide-to-the-use-of-nitrogen-15-and-radioisotopes-in-the-studies-of-plant-nutrition-calculations-and-interpretation-of-data %D 1983 %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna
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