Sustainability indicators  measuring the immeasurable? 
Simon Bell and Stephen Morse.  
 - London  Earthscan,  1999  
 - xiv,175 pages:  illustrations ;  24 cm. 
<br/><br/>Includes bibliographical references and index.  
<br/><br/><label>ISBN: </label>1853834971 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental indicators.<br/>Sustainable development--Evaluation.