TY  - BOOK
AU  - Bellman, Richard
AU  - Cooke, Kenneth L.
TI  - MODERN ELEMENTARY DIFFERENTIAL EQUATIONS
U1  - 515.35 
PY  - 1971///
CY  - Reading, Mass.
PB  - Addison-Wesley Publishing Co.
KW  - Differential Equations
N1  - Bibliography : P. 217-218
ER  -