Quantum redactiones paginae "Placentalia" differant
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* McKenna, M.C. & Bell, S.K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York.: i-xii, 1-631.
* Vaughan, Terry A., James M. Ryan, and Nicholas J. Czaplewski. 2000. ''Mammalogy: Fourth Edition''. Saunders College Publishing, 565 pp. ISBN 0-03-025034-X
==Vide etiam==
* [[Boreoeutheria]]
* [[Exafroplacentalia]]
==Nexus externi==
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