TY  - BOOK
AU  - "Boyce, William E."
AU  - "Dilprima, Richard C"
TI  - Elementary differential equations and boundary value problems
SN  - 0-471-50998-1
U1  - 515.15 
PY  - 1992///
CY  - U.S.A.
PB  - John Wiley And Sons
ER  -