000 00409nam a2200145Ia 4500
082 _a372.7
_bPUT
100 _aPunjab Textbook Board
_9203940
245 _aA textbook of algebra and trigonometry
_b: class XI
_cPunjab Textbook Board
260 _aLahore:
_bPunjab Textbook Board,
_c1999.
300 _b429p.
500 _apbk
546 _aeng
650 _aMathematics-Study and teaching
_9203941
942 _cBK
999 _c19771
_d19771