TY  - BOOK
AU  - Boyce Willium E.
AU  - Diprima Richard C.
TI  - Elementary differential equations and boundary value problems 
SN  - 0471093343
U1  - 515.39 
PY  - 1965///
CY  - New york
PB  - John wiley and sons
N1  -  Includes bibliographical references and index
ER  -