Treoretical ecology  principles and applications 
edited by Robert M.May 
 - 2nd ed. 
 - Oxford  Blackwell Scientific Publications  1981 
 - 489p. ill. 24cm. 
<br/><br/><label>ISBN: </label>0632007680 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology