Critical evaluation of systems analysis in ecosystems research and management / 
G.W. Arnold and C.T. de Wit editor 
 - Wageningen :  Center for Agricultural Publishing and Documentation,  1976 
 - 108 p. :  ill. ;  20 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9022005933 
<br/><br/><label>LCCN: </label>77-351050 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Congresses