TY  - BOOK
AU  - Bear,H.S.
TI  - Differential equations: a concise course 
SN  - 0486406784 (rustica)
AV  - QA371 B375
PY  - 1999///
CY  - Mineola, New York
PB  - Dover
KW  - Ecuaciones diferenciales
ER  -