TY  - BOOK
AU  - Cronin,Jane
TI  - Differential equations: Introduction and qualitative theory 
T2  - Pure and applied mathematics
SN  - 0824768191
AV  - QA372 C75
PY  - 1980///
CY  - New York
PB  - Dekker
KW  - Ecuaciones diferenciales
ER  -