TY  - BOOK
AU  - Boyce,William E.
AU  - Di Prima,Richard E.
TI  - Elementary differential equations / 
SN  - 0471078948
U1  - 515.35 
PY  - 1986///
CY  - New York
PB  - John Wiley, 
KW  - Differential equations
N1  - 500-599; 515.35
ER  -