Hughes, Herbert W. <br/><br/>
A text-book of coal-mining:  for the use of colliery managers and others/ 
Herbert W. Hughes 
 - 5th ed. 
 - London:  Charles Griffin ,  1904 
 - xii, 563 p.:  ill.;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining engineering<br/>Mineralogy