Hein, Fred V. <br/><br/>
The contributions of physical activity to physical health 
by Fred V. Hein and Allan J. Ryan 
 - Washington, D.C.  American Association for Health, Physical Education and Recreation  1960 
 - 23p. 
<br/><br/> Reprint from Research Qutly., May 1960; $1.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health Education
<br/><br/><label>Dewey Class. No.: </label>O9 H364