Ayerst,P.W  1970 <br/><br/>
Health science / 
P.W .Ayerst 
 - Montague House ,London;  Evans brothers Ltd.  1976 
 - 63p.;  ill.  17cm 
<br/><br/><label>ISBN: </label>0237499738 
<br/><br/><label>LC Class. No.: </label>RA 776  / .P 692 1976