000
00269nam a2200109Ia 4500
008
230512s9999 xx 000 0 und d
100
_a
gupta a .das
245
0
_a
problems in IIT mathematics
260
_a
patna
_b
bharti bhawan
650
_a
competitive exams
942
_c
BK
999
_c
6839
_d
6839