Puijila (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Puijila" in Polish language version.

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doi.org

Natalia Rybczynski, Mary R. Dawson, Richard H. Tedford. A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia. „Nature”. 458, s. 1021–1024, 2009. DOI: 10.1038/nature07985. (ang.).