TY  - BOOK
AU  - Niven,Ivan
AU  - kelley, John L. 
AU  - Halmos, Paul R. 
TI  - Calculus: an introductory approach 
T2  - University series in undergraduate mathematics
U1  - 515.15 23
PY  - 1961///
CY  - London
PB  - Van Nostrand
KW  - Calculus
N1  - Include index
ER  -