Olsen, O. Wilford  1901- <br/><br/>
Animal parasites :  their life cycles and ecology / 
by O. Wilford Olsen ; illustrations by the author. 
 - New York :  Dover,  1986. 
 - xii, 562 p. :  ill. ;  28 cm. 
<br/><br/> Reprint. Originally published: 3rd ed. Baltimore : University Park Press, 1974. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0486651266 (pbk.) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parasitology.<br/>Parasites--Life cycles.