Sinclair, John <br/><br/>
Coal-Mining Economics organization and Management 
/ by John Sinclair 
 - London:  Sir Isaac Pitman & Sons, Ltd.,  1957. 
 - vi, 337p.; 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>338.272  / SIN/C