Raju, D. S. N. <br/><br/>
ONGC Bulletin (charts) 

 - Dehradun :  Keshava Devamalaviya Institute of Petroleum Exploration Dehradun,  2009. 
 - various pagination : 
<br/><br/> Introductory notes to 15 charts (texts). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mega chart<br/>ONGC
<br/><br/><label>Dewey Class. No.: </label>559.859  / RAJ/O-II