O. Wilford Olsen <br/><br/>
Animal parasites : Their life cycles and ecology. Ed 3 

 - 3rd Edition 
 - Baltinore  University Park Press  1974 
 - 562p 
<br/><br/>O. Wilford Olsen: Animal parasites : Their life cycles and ecology. Ed 3.  (3rd Edition)  Baltinore.  University Park Press, 1974. 0-8391-0643-3--(591.233OLS)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>0-8391-0643-3 
<br/><br/><label>Dewey Class. No.: </label>591.233  / OLS