TY  - GEN
AU  - Singh, R. K. 
TI  - Petro economics / 
SN  - 9789351115707
U1  - 338.272 820954 
PY  - 2015///.
CY  - New Delhi : 
PB  - Random Publications, 
KW  - Petroleum industry and trade
N1  - Includes index
ER  -