Strughold, Hubertus. <br/><br/>
Your body clock / 
Hubertus Strughold, foreword by Charles H. Roadman. 
 - New York :  Scribner,  1971. 
 - 94 p. :  ill. 
<br/><br/><label>ISBN: </label>0207954518 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological rhythms.