Guild, Warren R. How to keep fit and enjoy it: a step-by-step approach to fitness after 30/ Warren R. Guild - New York: Happer and Row Pub, c1962 - xix, 184 p.; 22 cm. Includes index ISBN: $ 5.95 Subjects--Topical Terms: Physical fitnessPhysiologyHealthHygiene Dewey Class. No.: 613