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калиброванных лет до настоящего времени (Radiocarbon dating [радиоуглеродный анализ]: cal BP – calibrated years before the present; cal ka BP – calibrated thousand years before the present; cal Ma BP – calibrated million years before the present; thoughtco.com Dms64) |
cal BP: 3 phrases in 2 subjects |
Research and development | 2 |
Scientific | 1 |