TY  - BOOK
AU  - Leithold Louis
TI  - Essentials of calculus for business and economics
SN  - 0060439475
U1  - B320bX, L8 
PY  - 1978///
CY  - New York
PB  - Harper and Row Publishers      
KW  - Calculus
N1  - Appendix: P 37
ER  -