Francis, Wilfrid. <br/><br/>
Coal :  its formation and composition / 
Wilfrid Francis. 
 - London :  Edward Arnold,  1961. 
 - viii, 806 p. :  ill. 
<br/><br/><label>LCCN: </label>93044239     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal.