Wilson, John Rowan,  1919- <br/><br/>
Margin of safety;  the story of poliomyelitis vaccine. 

 - London,  Collins,  1963. 
 - 256 p.  illus.  22 cm. 
<br/><br/><label>LCCN: </label>63003881  
<br/><br/><label>Nat. Bib. No.: </label>GB63-7148 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Poliomyelitis vaccine.
<br/><br/><label>LC Class. No.: </label>RJ496.P2  / W74 1963 
<br/><br/><label>Dewey Class. No.: </label>616.835