Usher, Michael B., 1941- <br/><br/>
Biological management and conservation  ecological theory, application and planning 
M. B. Usher 
 - London  Chapman & Hall  1973 
 - xiii, 394 p. : ill. ; 24 cm. 
<br/><br/> 'Distributed in the U.S.A. by Halstead Press, a division of John Wiley & Sons, Inc., New York.' 
<br/><br/>Bibliography: p. 372-385. 
<br/><br/><label>ISBN: </label>0412113309 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Nature conservation<br/>Ecology--Technique<br/>Conservation of natural resources