Book
Arratia, G., Wilson, M.V.H. & Cloutier, R.
2004. Recent Advances in the Origin and Early Radiation of Vertebrates. Verlag Dr. Friedrich Pfeil, München, Germany.
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Chapters
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Carr, R.K., 2004.
Recognizing paraphyletic stem groups: A case study in the analysis of eubrachythoracid arthrodires (Placodermi): 127-138, 9 figs., 1 tab..
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Lund, R. & Grogan, E.D., 2004.
Five new euchondrocephalan Chondrichthyes from the Bear Gulch Limestone (Serpukhovian, Namurian E2b) of Montana, USA: 505-531, 12 figs., 2 tabs..