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- [5] MEASUREMENTS OF CONCENTRATION AND C-13-C-12 ISOTOPE RATIOS IN ATMOSPHERIC CO2 HELVETICA PHYSICA ACTA, 1980, 53 (04): : 629 - 629
- [6] DROUGHT INDICATED IN C-13-C-12 RATIOS OF SOUTHWESTERN TREE RINGS WATER RESOURCES BULLETIN, 1989, 25 (02): : 341 - 347
- [8] CONTRIBUTION OF TECHNOGENIC CO2 TO BALANCE OF ATMOSPHERE CARBON-DIOXIDE (STUDY OF C-13-C-12 IN ANNUAL RINGS OF TREES) DOKLADY AKADEMII NAUK SSSR, 1975, 225 (01): : 190 - 191