000 00377nam a2200145Ia 4500
020 _a0000000000
082 _bT-267
_a001.642
100 _a"Chattha, Dr. Muhammad Atif"
245 0 _aComputer science 9 2020-21
260 _bPunjab curriculum textbook board
_aLahore
_c2020
300 _a122
944 _cTB
999 _c263619
_d263619