Best Practice Gguidance for Effective Methane Drainage and use in Local Mines No-31 
United Nations 
 - New York :  United Nations  2010. 
 - 69p 
<br/><br/> The ECE energy Series No-31 
<br/><br/><label>ISBN: </label>9789211170184 
<br/><br/><label>Dewey Class. No.: </label>622.82  / BES.Q0