Analysis of information sources in references of the Wikipedia article "Karl Ernst von Baer" in English language version.
...- dreizehn Jahre später von dem berühmten Estländer Biologen Karl Ernst von Baer...[permanent dead link ]
Three years later, the Estonian, Karl Ernst von Baer, finally found the true mammalian egg in a pet dog (von Baer, 1827).
Three years later, the Estonian, Karl Ernst von Baer, finally found the true mammalian egg in a pet dog (von Baer, 1827).
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