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  Herder-Institut: Lit-DB

  http://www.litdok.de/cgi-bin/litdok?lang=de&t_multi=x&v_0=PER&q_0=puttkamer,+joachim+von

  Keine Beschreibung vorhanden.

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  ESO - Future Facilities: E-ELT

  http://wayback.archive.org/web/20140914065400/http://www.eso.org/public/astronomy/projects/e-elt.html

  ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.

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