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URL: http://books.google.com/books?id=UK0IAAAAQAAJ (Google Books. Digitalisiert: 11. Juni 2007, Vorlage: Oxford University) [G; PDF]
URL: http://hdl.handle.net/2027/mdp.39015035914590 (University of Michigan, Hathi Trust Digital Library) [G; PDF; TXT]
[DDC: 891.21]