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2 entries under geohistory topic. ×

4
extant eocene first appearance(expression, appearance, geochronolog)
3
ypresian first appearance(expression, appearance, period)
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APASmart Define. (1970). extant ypresian first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/extant_ypresian_first_appearance/thesaurus/broader
ChicagoSmart Define. 1970. "extant ypresian first appearance thesaurus" https://smartdefine.org/extant_ypresian_first_appearance/thesaurus/broader (accessed October 1, 2026).
HarvardSmart Define 1970, extant ypresian first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/extant_ypresian_first_appearance/thesaurus/broader>.
MLASmart Define. "extant ypresian first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/extant_ypresian_first_appearance/thesaurus/broader>