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.
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 |