Science: a second level course the earth's physical resources 
by Open University 
 - Walton Hall  Milton Keynes Open University  1973 
 - 172p. 
<br/><br/> Block I.Energy resources 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy resources<br/>Natural resources
<br/><br/><label>Dewey Class. No.: </label>Y Op2/2