Joined 16 November 2008
- English Wikipedia: w:en:User:Martin_Kraus
- German Wikipedia: w:de:User:Martin_Kraus
- English Wikibooks: b:en:User:Martin_Kraus
- German Wikibooks: b:de:User:Martin_Kraus
- Wikimedia Commons: commons:User:Martin_Kraus
Most of my activities are currently on en.wikibooks.org.
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