Howard, Joanna. <br/><br/>
Preventive medicine / 
Joanna Howard. 
 - [1st ed.]. 
 - London, U.K. :  Heinemann Educational Books,  [c1981] 
 - Heinemann Science and Technical Readers / series editor: C.J. Moore .
<br/><br/> Cover photograph of typhoid colonies on nutrient agar. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medicine, Preventive.