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  Käferbuch. Naturgeschichte der Käfer Europas. Zum Handgebrauche für Sammler (1876)

  http://caliban.mpipz.mpg.de/calwer/index.html

  Keine Beschreibung vorhanden.

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  Life in Amber - George O. Poinar - Google Books

  https://books.google.de/books?id=J72FOr6AZOEC&printsec=frontcover&hl=de&source=gbs_ge_summary_r&cad=0#v=twopage&q&f=false

  "Amber is a semi-precious gem that is formed over eons by natural forces out of the resin of trees. Human fascination with amber dates back to prehistoric times, when it was probably considered to have magical powers and was used for adornment and…

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