Sources     1. Bill Pullum and Frank Hanenkrat "The New Position Rifle Shooting" 1997 Target Sports Education Center 2. Gaby Buhlmann, Heinz Reinkemeier, Maik Eckhardt, and Bill Murray "Ways of the Rifle" 2002 MEC 3. Heinz Reinkemeier, Gaby Buhlmann, Maik Eckhardt, Claudia Kulla, and Uwe Linn "Air Rifle Shooting" 2004 MEC 4. Owensboro Community and Technical College <http://www.octc.kctcs.edu/> 5. Paul G. Hewitt "Conceptual Physics" 1989 City College of San Francisco 6. Rose-Hulman Institute of Technology website <http://www.rose-hulman.edu/users/groups/RifleTeam/Public/HTML/index.html>