TY  - BOOK
AU  - Ahsan Akthar and  Sabin Ahsan
TI  - Textbook of Differential Calculus
SN  - 9788120338531 
U1  - 510  AHS-T2 
PY  - 2009///
CY  - New Delhi
PB  - PHI Learning 
KW  - Mathematics
KW  - Differential Calculus
ER  -