State of humanity 
edited by Julian L. Simon 
 - Oxford  Blackwell  1995 
 - 694p. 
<br/><br/><label>ISBN: </label>155786585X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution<br/>Natural resources<br/>Ecology<br/>Environment - Economic aspects
<br/><br/><label>Dewey Class. No.: </label>O91 Si54