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- [6] METHOD OF ANALYSIS OF RATIO C-13-C-12 IN ORGANIC-MATTER AND RATIOS C-13-C-12 AND O-18-O-16 IN CARBONATES ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS, 1979, 51 (02): : 275 - 286
- [8] CITATION CLASSIC - 2 CATEGORIES OF C-13-C-12 RATIOS FOR HIGHER-PLANTS CURRENT CONTENTS/AGRICULTURE BIOLOGY & ENVIRONMENTAL SCIENCES, 1980, (43): : 10 - 10
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- [10] INTRAMOLECULAR C-13-C-12 ISOTOPE RATIOS OF ACETIC-ACID OF BIOLOGICAL AND SYNTHETIC ORIGIN BIOMEDICAL MASS SPECTROMETRY, 1981, 8 (10): : 496 - 499