Vorobjev B M <br/><br/>
Advanced coal mining 
Vorobjev B M; Deshmukh R T 
 - NA  NA         1966 
 - 2V  cm. 
<br/><br/><label>Standard No.: </label>136,623 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X9H7551.1.N5, K6.1-.2