TY  - BOOK
AU  - Levy, Hyman
AU  - Lessman, F.
TI  - Finite difference equations
SN  - 0273413597
U1  - 517.6 
PY  - 1961///
CY  - New York
PB  - Macmillan
KW  - Difference equations
KW  - Invariant imbedding
KW  - Functional equations - Numerical solutions
ER  -