Cretaceous
Aptian article from the Palaeos website
Palaeos Mesozoic: Cretaceous: Early Cretaceous II, The Aptian-Albian
Albian Stage, Cretaceous Period in Hampshire hants museum geology periods
Albian Stage, Cretaceous Period in Hampshire - Hampshire Museums
Service
GeoWhen Database - Aptian stratigraphy stages
GeoWhen Database - Aptian
'Dinosaurs Mingled with Cousins of Ducks and Chickens', from Live Science
LiveScience.com - Dinosaurs Mingled with Cousins of Ducks and Chickens
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