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Anchor text: Prehistoric Pictures, in the Public Domain

Wikipedia: Oligocene

Anchor text: Benjamin Waterhouse Hawkins and his New York City Paleozoic Museum

Wikipedia: Benjamin Waterhouse Hawkins

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Wikipedia: File:Plesiosaurs-mosasaur.jpg

Anchor text: The Wonderful Paleo Art of Heinrich Harder

Wikipedia: Heinrich Harder

Anchor text: Compsognathus

Wikipedia: Eberhard Fraas