Franz Heinrich Ludolf Ahrens (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Franz Heinrich Ludolf Ahrens" in English language version.

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books.google.com

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wikisource.org

en.wikisource.org

  •  One or more of the preceding sentences incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Ahrens, Franz Heinrich Ludolf". Encyclopædia Britannica. Vol. 1 (11th ed.). Cambridge University Press. pp. 433–434.

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worldcat.org