http://purl.org/dc/terms/source
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http://gutefabrik.com/about.html (accessed 2018-11-15)
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http://gutefabrik.com/presskit/ (accessed 2018-10-25)
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https://en.wikipedia.org/wiki/Die_Gute_Fabrik (accessed 2018-11-15)
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https://www.mobygames.com/company/die-gute-fabrik-llc (accessed 2018-11-15)
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