Tonge J <br/><br/>
Coal Mining 
Tonge J 
 - London  Macmillan  1906 
 - 362p. 
<br/><br/><br/>English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining 
<br/><br/><label>Dewey Class. No.: </label>Obvci 8 1906