Crawford, C L <br/><br/>
Poliomyelitis in developing countries.  [electronic resource] 

 -  BMJ (Clinical research ed.)  Aug 1992 
 - 475-6 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0959-8138 
<br/><br/><label>Standard No.: </label>10.1136/bmj.305.6851.475-c  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child<br/>Developing Countries<br/>Humans<br/>Paralysis--etiology<br/>Poliomyelitis--diagnosis