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Bagong pahina: {{paleogene}} Ang '''Oligoseno''' (Ingles: '''Oligocene''' at may simbolong O<sub>G</sub><ref>{{cite web |url=http://pubs.usgs.gov/of/1999/of99-430/of99-430_sec38.pdf |accessdate=...
(Bagong pahina: {{paleogene}} Ang '''Oligoseno''' (Ingles: '''Oligocene''' at may simbolong O<sub>G</sub><ref>{{cite web |url=http://pubs.usgs.gov/of/1999/of99-430/of99-430_sec38.pdf |accessdate=...) |
(Walang pagkakaiba)
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