Technical bulletin /  
Department of Mines and Technical Surveys. Mines Branch 
 - Ottawa :  Department of Mines and Technical Surveys. Mines Branch,  1959-1974 
 - v. 
<br/><br/><label>ISSN: </label>0576-2685 
 = Technical bulletin - Mines Branch 
 = Tech. bull.- Mines Branch 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGENIERIA<br/>MINERIA
<br/><br/><label>Universal Decimal Class. No.: </label>62