ISBN 1614010633 books & textbook
Gentle Core: Start Toning Your ABS, Building Your Back Muscles, and Reclaiming Core Fitness Today (Harvard Medical School Special Health Reports)
Edward M. Phillips Josie Gardiner Jo Prouty
Harvard Health Publications /2014-02-28 Paperback / 50 Pages
isbn-10: 1614010633 / isbn-13: 9781614010630
