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- [43] APPLICATION OF SECONDARY ION MASS MICROANALYSIS FOR IMAGING THE DISTRIBUTION AND FOR DETERMINATION OF ISOTOPE RATIOS OF THE STABLE ISOTOPES OF NITROGEN, N-14 AND N-15, IN TISSUE-SECTIONS OF LEMNA-GIBBA L COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE III-SCIENCES DE LA VIE-LIFE SCIENCES, 1986, 302 (03): : 109 - &