An investigation of the coals of Canada, with reference to their economic qualities 

 - Ottawa, Ontario  Government Printing Bureau  1912 
 -  ilus. 
 -  v.1 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>CARBON
<br/><br/><label>Subjects--Geographic Terms: </label><br/>CANADA
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.330971/C23