M. B Usher <br/><br/>
Biological Management and conservation 

 - London  Chapman and hall  1973 
 - 394p 
<br/><br/>M. B Usher: Biological Management and conservation.  London.  Chapman and hall, 1973. 412-11330-9--(574.5USH)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>412-11330-9 
<br/><br/><label>Dewey Class. No.: </label>574.5  / U S H