TY  - BOOK
AU  - Dr Nazia A Chaudry
TI  - A textbook of physics class XI
U1  - 530 N239A [n.d.] 
PY  - 0000///[n.d.]
CY  - Lahore
PB  - Punjab Textbook Board
KW  - SCIENCE -- Energy
KW  - Physique
ER  -