Dubnie, Amil <br/><br/>
Northern mining problems with particular reference to unit operations in permafrost 
Dubnie, Amil 
 - Ontario  Mines Branch  1972 
 - 22 p. 
 - Technical bulletin, TB  148 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>pergelisol<br/>explotación minera<br/>permafrost
<br/><br/><label>Subjects--Index Terms: </label>minería 
<br/><br/><label>Universal Decimal Class. No.: </label>669