TY  - BOOK
AU  - Etgen, Garret J.
AU  - Morris, William L. (jt.auth)
TI  - An introduction to ordinary differential equations: : with difference equations, numerical methods, and applications
SN  - 006041913X
U1  - 515.352 
PY  - 1977///
CY  - New York
PB  - Harper and Row
KW  - Differential equations
N1  - HB
ER  -