HAGAN, W H <br/><br/>
[Evolution of virology].  [electronic resource] 

 -  Boletin de la Oficina Sanitaria Panamericana. Pan American Sanitary Bureau  Nov 1957 
 - 415-23 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0030-0632 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological Evolution<br/>Viruses