J.A. Clarke (2013). Princeton Guide to Evolution. Princeton University Press.
Read MoreThe Basal Clades of Modern Birds (PDF) [book chapter]→
/J. Cracraft and J.A. Clarke (2001). In New perspectives on the Origin and Early Evolution of Birds: Proceedings of the International Symposium in Honor of John H. Ostrom. Peabody Museum of Natural History, Yale University, pp. 143-156.
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