Lock Stephen <br/><br/>
The medical risks of life / 
Stephen Lock and Tony Smith. 
 - Harmondsworth :  Penguin,   1976. 
 - 328 p.,  19 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0140215956 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hygiene
<br/><br/><label>LC Class. No.: </label>WB 120