TY  - BOOK
AU  - Akhatar, Ahsan
AU  - Ahsan, Sabiha
TI  - Textbook of Differential calculus
SN  - 9788120338531
U1  - 515.33 
PY  - 2009///
CY  -  New Delhi
PB  - PHI Learining p.Ltd
N1  - Includes bibliographical reference and index
ER  -