El Tiempo geológico
Published in 32 languages; includes a selection in Braille in eng, fre, spa, kor
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| Format: | article biblioteca |
|---|---|
| Language: | spa |
| Subjects: | Geochronology, Stratigraphy, Rocks, Earth (planet), Time measuring instruments, Fossils, International Geoscience Programme, |
| Online Access: | https://unesdoc.unesco.org/ark:/48223/pf0000069531_spa |
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