Workability indices of coal seams 
/ Funded from coal S & T Grant of Department of Coal, Ministry of Energy, Government of India December 1986 - December 1989 
 - Dhanbad:   Central Mining Research Station,   1992 
 - 64p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Workability project
<br/><br/><label>Universal Decimal Class. No.: </label>T 622.273  / N2