Wilson, John Rowan <br/><br/>
Margin of safety:  the story of poliomyelitis vaccine/ 
John Rowan Wilson 
 - London:  Collins,  1963 
 - 256 p.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> Rs. 21.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Poliomyelitis vaccine<br/>Poliomyelitis<br/>Entervirus diseases
<br/><br/><label>Dewey Class. No.: </label>614.549