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George Demetriou

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Football Rule Differences 2011: NFHS & NCAA Rules Compared
2014 Football Rule Differences: NFHS & NCAA Rules Compared
Football Rule Differences 2007
Football Rule Differences 2006
Football Rule Differences 2001
Football Rule Differences 1999
Football Rule Differences, 1998
Football Officials Guidebook High School Mechanics 2006-07
Study Guide College Baseball Rules 2023-2024
Smart Baseball Umpiring How to Get Better Every Game
The Official's Guide: Basketball
The Official's Guide, Basketball
Football Officials Guidebook Mechanics for Crews of Four and Five Officials
Football Officials Guidebook Mechanics for a Crews of Four and Five Officials