Natural resources of developing countries : investigation, development and rational utilization 

 - New York  United Nations  1970 
 - ix,174p.;   24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources-Developing countries
<br/><br/><label>Dewey Class. No.: </label>333.7091724  / UNI