TY  - GEN
AU  - Vanik Education
TI  - Physics & chemistry: for OCS (Preliminary) examination 
U1  - R.R. 500 23rd ed. 
PY  - 2022///
CY  - Bhubaneswar
PB  - Vanik  Education
KW  - Physics
KW  - Examination, questions etc.
KW  - Chemistry
KW  - Examinations, questions etc.
ER  -