TY  - BOOK
AU  - Ortega James M
AU  -  Poole William G
TI  - Introductin to numerical methods for differential equations
U1  - B33:1, M1;1 
PY  - 1981///
CY  - Massachusets
PB  - Pitam         
KW  - Differential equations
N1  - Bibliography 317-22p; Appendix 305-16p
ER  -