- September 2012 (27)
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URL: http://books.google.com/books?id=8iwOAAAAIAAJ (Google Books. Vorlage: Stanford University) [G; PDF]
URL: http://books.google.com/books?id=KiUYAAAAYAAJ (Google Books. Digitalisiert: 1. April 2008, Vorlage: New York Public Library) [G; PDF]
URL: http://books.google.com/books?id=KqYIAAAAQAAJ (Google Books. Digitalisiert: 11. Juni 2007, Vorlage: Oxford University) [G; PDF]
URL: http://books.google.com/books?id=mt1CAAAAcAAJ (Google Books. Digitalisiert: 9. Juni 2010, Vorlage: BSB München) [G; PDF]
[DDC: 491.25]