Research report.   Mines Branch 
 Research report - Dep. of Mines and Technology Surveys. Mines Branch 

 - Ottawa :  Department of Mines and Technical Surveys,  1958-1974 
 - v. 
<br/><br/><label>ISSN: </label>0068-7871 
 = Research report - Mines Branch 
 = Res. rep. - Mines Branch 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGENIERIA
<br/><br/><label>Universal Decimal Class. No.: </label>62