Article PDF
References
Perle, A., Norell, M. A., Chiappe, L. M. & Clark, J. M. Nature 362, 623–626 (1993).
Schultze, H.-P. & Trueb, L. (eds) Origins of the Higher Groups of Tetrapods (Comstock, Ithaca, 1991).
Gauthier, J. Mem. Calif. Acad. Sci. 8, 1–56 (1986).
Heilmann, G. The Origin of Birds (Witherby, London, 1926).
Feduccia, A. & Tordoff, H. B. Science 203, 1021 (1979).
Sereno, P. C. & Rao, C. Science 255, 845 (1992).
Sanz, J. L. & Bonaparte, J. F. in Papers in Avian Paleontology Honoring Pierce Brodkorb (ed. Campbell, K. E. Jr) 39–49 (Nat. Hist. Mus. Los Angeles, Sci. Ser. 36, Los Angeles, 1992).
Sanz, J. L. & Buscaltoni, A. D. Palaeontology 35, 829–845 (1992).
Alvarenga, H. M. F. & Bonaparte, J. F. in Papers in Avian Paleontology Honoring Pierce Brodkorb (ed. Campbell, K. E. Jr) 51–64 (Nat. Hist. Mus. Los Angeles, Sci. Ser. 36, Los Angeles, 1992).
Elzanowski, A. & Wellnhofer, P. Nature 359, 821 (1992).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Milner, A. Ground rules for early birds. Nature 362, 589 (1993). https://doi.org/10.1038/362589a0
Issue Date:
DOI: https://doi.org/10.1038/362589a0