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Paleobotany -- North America -- Congresses. / https://id.loc.gov/authorities/subjects/sh85097026 https://id.loc.gov/authorities/subjects/sh85092455-781 https://id.loc.gov/authorities/subjects/sh99001533
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Paleobotany -- Oregon. / https://id.loc.gov/authorities/subjects/sh85097026 https://id.loc.gov/authorities/names/n79021953-781 : Mamay, Sergius H.,
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Paleobotany -- Tertiary -- Congresses. / https://id.loc.gov/authorities/subjects/sh85097052 https://id.loc.gov/authorities/subjects/sh99001533 : Symposium on Palynology of the Late Cretaceous and Early Tertiary
1970
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Paleobotany -- Virginia. / https://id.loc.gov/authorities/subjects/sh85097026 https://id.loc.gov/authorities/names/n79022909-781 : Hueber, Francis M.
Paleoclimatology -- Great Plains -- Congresses. / https://id.loc.gov/authorities/subjects/sh85097057 https://id.loc.gov/authorities/subjects/sh85056998-781 https://id.loc.gov/authorities/subjects/sh99001533 : Symposium on Pleistocene and Recent Environments of the Central Plains