TY  - BOOK
AU  - Kamat, R.V..
TI  - IPA Monographs in Physics: The action Principle in physics / 
SN  - 81 224 0705 6
U1  - C 
PY  - 1995///
CY  - New Delhi-110 002 : 
PB  - New Age International Publishers Ltd. , 
KW  - relativity
ER  -