1991 UNDP annual report :  the challenge of the environment. 

 - New York :  United Nations Development Programme,  1991. 
 - 36p.:  ills.;  28cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development--Environmental aspects.<br/>Environmental policy.<br/>Sustainable development.
<br/><br/><label>Gov. Doc. Class. No.: </label>UN/DP AR-1991