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Ulrich and Busing Upietz

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Stand Alone

Porsche Sport 2007
Porsche Sport 2006
Porsche Sport 2004: Offizielles Porsche Motorsport Jahrbuch 2004
Porsche Sport 2003.
Porsche Sport 1999
Der Erfolgstyp Porsche 911 GT1 1998
Porsche Sport 1996
World Sportscar Racing 1994