Report in respect of ventilation standards. 

 - [Delhi]  Office of Chief Inspector of Mines, Ministry of Labour and Employment, Govt. of India,  1963 [i.e. 1968] 
 - iii, 63 p.  illus.  25 cm. 
<br/><br/>Bibliography: p. 10-11. 
<br/><br/><label>LCCN: </label>sa 68013596  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine ventilation.
<br/><br/><label>LC Class. No.: </label>TN301  / .I56 
<br/><br/><label>Dewey Class. No.: </label>622/.42