Brown R Lester <br/><br/>
State Of The World 1990 A Worldwatch Institutereport On Progress Toward A Sustainable Society Lester R Brown Et Al 

 -  New York: W. W. Norton And Co. 1990. 
 - 253 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>0393306143(Pbk);0393207880