TY  - BOOK
AU  - Zienkiewicz O C
AU  -  Morgan K
TI  - Finite elements and approximation
U1  - B33:1, M3 
PY  - 1983///
CY  - New York    
PB  -  John Wiley       
KW  -  Fnite element methods
KW  - Approximation theory
N1  - Includes bibliography
ER  -