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Friedrich Opel (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Friedrich Opel" in Portuguese language version.

refsWebsite
Global rank Portuguese rank
1digitale-sammlungen.de
958th place
9,796th place

digitale-sammlungen.de

daten.digitale-sammlungen.de

  • Hans Christoph Graf von Seherr-Thoß: Opel, Fritz (eigentlich Friedrich Franz). In: Neue Deutsche Biographie (NDB). Band 19, Duncker & Humblot, Berlin 1999, ISBN 3-428-00200-8, digitalizado. (em alemão)