TY  - BOOK
AU  - Richard  E. Williamson
TI  - Introduction to differential equations ODE, PDE and Series
SN  - 0-13-480987-0
U1  - 515.35 
PY  - 1986///
CY  - California
PB  - Prentice Hall
N1  - Richard  E. Williamson: Introduction to differential equations ODE, PDE and Series.  California.  Prentice Hall, 1986. 0-13-480987-0--(515.35WIL)
ER  -