TY  - BOOK
AU  - Levy, H
AU  - Lessman, F
TI  - Finite difference equations
U1  - 515.3 
PY  - 1959///
CY  - London
PB  - Sir Isaac Pitman & Sons Ltd
KW  - Science 
KW  - Mathematics 
KW  - Analysis
KW  -  Differential calculus and equations
ER  -