Lewin, Roger. <br/><br/>
Hormones :  chemical communicators / 
by Roger Lewin ; illustrations by Sandra Barnaby. 
 - London, :  Geoffrey Chapman,  1972. 
 - 127 p. :  ill. ;  18 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0225658720 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hormones.