State of the World 1991 :    a Worldwatch Institute report on progre ss toward a sustainable society /  
Lester R. Brown ... [et al.] 
 - New York :    W. W. Norton & Co. ,    1991. 
 - xvii, 254 p. :    ill. ;    23 cm. 
<br/><br/>  Includes index. 
<br/><br/><label>ISBN: </label>0393307336 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Environmental protection -- 1991.<br/> Environmental impact analysis -- 1991.
<br/><br/><label>Dewey Class. No.: </label>330.9