Toews,  Waltner - David <br/><br/>
Ecosystem sustainability and health    a practical Approach  
Waltner - David Toews 
 - Cambridge   Cambridge University Press  2004 
<br/><br/><label>ISBN: </label>9780521531856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecosystem Management.
<br/><br/><label>LC Class. No.: </label>QH 75 .W35