Møller, A P <br/><br/>
Immune defense and host sociality: a comparative study of swallows and martins.  [electronic resource] 

 -  The American naturalist  Aug 2001 
 - 136-45 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1537-5323 
<br/><br/><label>Standard No.: </label>10.1086/321308  doi