Determinants of costs and productivitiy in coal mi 

 - Delhi  University of Delhi          1983 
 - 76p Bibliography: P 75-76  cm. 
 - University of Delhi, Economics (Deptt. of-), Dissertation. Dissertation, University of Delhi, Economics (Deptt of- .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/> COAL<br/>INDUSTRIAL ECONOMICS