TY  - BOOK
AU  - Das,Ashok
TI  - Lectures on gravitation
SN  - 9789814329378
U1  - 531/.14 
PY  - 2011///
CY  - Singapore
PB  - World Scientific
KW  - General relativity (Physics)--Textbooks
KW  - Big bang theory--Textbooks
ER  -