Weeks, Molly. The BalleCore workout : integrating Pilates, hatha yoga, and ballet in an innovative exercise routine for all fitness levels / Molly Weeks. - 1st ed. - New York : Ballantine Books, c2005. - xii, 273 p. : ill. ; 24 cm Includes index. ISBN: 0345471903 (pbk.) LCCN: 2004048852 Subjects--Topical Terms: Exercise.Physical fitness.Pilates method.Hatha yoga.Ballet. LC Class. No.: RA781 / .W374 2005 Dewey Class. No.: 613.7/1