TY  - BOOK
AU  - Derrick,William R.
TI  - Elementary diferential equations whit applications / 
T2  - This book is in the addison-wesley series in mathematics
AV  - QA372  D47 1976 
PY  - 1976///
CY  - Reading, Massachusetts : 
PB  - Addison-Wesley, 
KW  - Lemb
KW  - Ecuaciones diferenciales
N1  - Incluye apéndice e índice
ER  -