Readings in environmental management 
by United Nations Environment Programme 
 - Bangkok  United Nations Environment Programme  1979 
 - 416p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social mobility -- Congresses<br/>Education and state -- Congresses<br/>Educational equalization -- Congresses
<br/><br/><label>Dewey Class. No.: </label>O91 Un3