Axel Gudbrand Blytt (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Axel Gudbrand Blytt" in Italian language version.

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1books.google.com

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books.google.com

Charles Darwin, More letters of Charles Darwin: a record of his work in a series of hitherto unpublished letters, J. Murray, 1903, pp. 11, 17.