TY  - BOOK
AU  - Akhtar,Ahsan
AU  - Ashan, Sabiha
TI  - Textbook of differential calculus / 
U1  - 515.33 21
PY  - 2009///
CY  - New Delhi : 
PB  - PHI Learning , 
KW  - DIFFERENTIAL CALCULUS
N1  - Includes bibliographical referrences and index
ER  -