Usher M B <br/><br/>
Biological management and conservation 

 - London  Chapman & Hall         1973 
 - xiii,394p.  cm. 
<br/><br/><label>Standard No.: </label>38113 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>G:527, L3