000
00265nam a22001217a 4500
082
_a
AHS
100
_a
Ahsan Akhtar
245
_a
Text book of differential calculus
250
_a
2nd ed
260
_a
New Delhi
_b
PHI Lerarning
_c
2009
300
_a
451
942
_c
BK
999
_c
55074
_d
55071