Marvin Harvey’s READY RHYTHYM RELEASE Instructional Development Poster. MARVIN HARVEY IS THE AUTHOR OF THE 3-R’s TRAINING SYSTEM KNOWN TODAY AS THE MOST RECONGIZED SHOOTING FORM IN THE WORLD. This poster has found its way into many NBA, NCAA, and High School locker rooms. You need this poster in your room to remind you of the 3-R‘s at all times.
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