TY  - BOOK
AU  - Cronin,Jane
TI  - Differential equations: introduction and qualitative theory 
T2  - Pure and applied mathematics
SN  - 0-8247-6819-1
U1  - 515, .35 18
PY  - 1980///
CY  - New York, Basel
PB  - Marcel Dekker
KW  - Differential equations
KW  - Ecuaciones diferenciales
ER  -