Mark D. Klein
Wikisimpsons - The Simpsons Wiki
{{Crew |name= Mark D. Klein |image= |gender= Template:Male cast))
Mark D. Klein is an American video game designer and programmer that worked with The Simpsons: Bart vs. the World.
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Mark D. KleinWikisimpsons - The Simpsons Wiki
{{Crew |name= Mark D. Klein |image= |gender= Template:Male cast)) Mark D. Klein is an American video game designer and programmer that worked with The Simpsons: Bart vs. the World. CreditsProgramDesign |
