Bird, W. (1991). The orgin of species revisited: The theories of evolution and of abrupt appearance. Regency.
Chicago-čujuhus (17. p.)Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Tennessee: Regency, 1991.
MLA-čujuhus (9. p.)Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Regency, 1991.
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