24th Annual International Pittsburgh Coal Conference 2007, September 10-14, 2007, Johannesburg, South Africa / 
International Pittsburgh Coal Conference 
 - Pittsburgh, Pennsylvania :  International Pittsburgh Coal Conference,  [2007] 
 - 4 v. :  ill. ; 28 cm. 
<br/><br/><label>ISBN: </label>9781604238617  RM478.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Congresses<br/>Coal--Combustion--Congresses<br/>Coal liquefaction--Congresses<br/>Coal gasification--Congresses