Krebs  charles  j' <br/><br/>
Ecological methodology 

 -  Addison wesley longman  1999 
<br/><br/><label>ISBN: </label>0-321-02173-8 
<br/><br/><label>LC Class. No.: </label>577.0727/KRE  / 3 
<br/><br/><label>Dewey Class. No.: </label>577.0727/KRE  / 3