1.
Zackback Sitting The Revolutionary Solution for Relieving Your Pain & Improving Your Posture
by Zacharkow, Dennis
ISBN: 9780966016932
List Price: $13.95
OUT OF STOCK
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Posture Sitting, Standing, Chair Design and Exercise
by Zacharkow, Dennis
ISBN: 9780398054182
List Price: $75.95
OUT OF STOCK
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Posture: Sitting, Standing, Chair Design and Exercise
by Zacharkow, Dennis
ISBN: 9780398065102
List Price: $51.95
OUT OF STOCK
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Healthy Lower Back Laying the Foundation Through Proper Lifting, Sitting, and Exercise
by Zacharkow, Dennis
ISBN: 9780398049843
List Price: $31.95