An Early Cretaceous bird from Spain and its implications for the evolution of avian flight
J. L. Sanz,
L. M. Chiappe,
B. P. Pérez-Moreno,
A. D. Buscalioni,
J. J. Moratalla,
F. Ortega, and
F. J. Poyato-Ariza
1996
Article
Nature
382:442-445
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