Onika, Dmitriæi Grigor§evich. <br/><br/>
Excavation of mine openings / 
by D.G. Onika. 
 - Rev. ed. / 
 - Moscow :   Mir Publishers,   1972. 
 - 458 p. :   ill. ;   22 cm. 
<br/><br/>  Rev. translation of Provedenie gornykh vyrabotok. 
<br/><br/>Icludes bibliographical references: p. [448]-449. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Shaft sinking.<br/> Coal mines and mining.
<br/><br/><label>Dewey Class. No.: </label>622.2