Grahan, David A. <br/><br/>
A treatise on the comparative commercial values of gas coals and cannels / 
David A. Grahan 
 - London:  Eand F. N. Spon,  1882 
 - 100 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal<br/>Cannel coal