Hawley Mones E Ed. <br/><br/>
Coal    scientific and technical aspects 

 - Dowden  Hutchinson         1976 
<br/><br/><label>Standard No.: </label>134,542 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X8(F551), L6.2-;1