Duff, C. E. <br/><br/>
Some principles in managing natural resources, two talks 

 - Lusaka  Northern Rhodesia Government  1962 
 - 21p.  22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources
<br/><br/><label>LC Class. No.: </label>EAF FOS HC103.D8