TY  - BOOK
AU  - Ahsan Akhtar
AU  - Sabiha Ahsan
TI  - Textbook of differential calculus
SN  - 8120324420
U1  - 515.33 
PY  - 2004///
CY  - India
PB  - Prentice Hall of India
KW  - Differential calculus
ER  -