World resources 1990-91 :  a report / 
by the World Resources Institute in collaboration with the United Nations Environment Programme and and the United Nations Development Programme. 
 - New York :  Oxford Univ. Press,  1990. 
 - xiv, 383 p. :  maps ;  28 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0195062299 0195062280 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources<br/>Environmental policy<br/>Economic policy--Environmental aspects
<br/><br/><label>LC Class. No.: </label>HC79.E5