Gauthier, J., Kluge, A.G. & Rowe, T., 1988b. The early evolution of the Amniota. In M.J. Benton (ed.), Phyl. Class. Tetrapods 1: 103-155. ≡
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Gauthier, J., Cannatella, D., de Queiroz, K., Kluge, A.G. & Rowe, T., 1989. Chapter 25. Tetrapod phylogeny. The Hierarchy of Life, 31 Aug 1989: 337-353.
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