TY  - BOOK
AU  - Etgen,Garret J.
AU  - Salas,S.L.
AU  - Hille,Einar
TI  - Calculus: several variables 
SN  - 0471449709
PY  - 2003///
CY  - New York
PB  - John Wiley & Sons
KW  - Calculus
ER  -