• 

  Flora of Barro Colorado Island - Thomas B. Croat - Google Books

  http://books.google.de/books/about/Flora_of_Barro_Colorado_Island.html?id=Whc_ahfhFFoC&redir_esc=y

  Florenwerke, Panama.

• 

  Spherical Trigonometry: For the Use of Colleges and Schools - Isaac Todhunter - Google Books

  http://books.google.de/books?id=8M02AAAAMAAJ

  Keine Beschreibung vorhanden.

• 

  Euclidean Geometry: A First Course - Mark Solomonovich - Google Books

  http://books.google.de/books?id=it4Pko36IcYC

  This textbook is a self-contained presentation of Euclidean Geometry, a subject that has been a core part of school curriculum for centuries. The discussion is rigorous, axiom-based, written in a traditional manner, true to the Euclidean spirit.…

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  Category:Circle geometry – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Circle_geometry?uselang=de

  Keine Beschreibung vorhanden.

• 

  ESO - 2003

  https://web.archive.org/web/20070607184018/http://www.eso.org/public/outreach/press-rel/pr-2003/pr-05-03.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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  The Colour of the Young Universe | ESO Deutschland

  https://www.eso.org/public/germany/news/eso0339/

  Pressemitteilungen

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