TY  - BOOK
AU  - Goldberg,Samuel
TI  - Introduction to difference equations: with illustrative examples from economics, psychology, and sociology 
SN  - 0471310514
PY  - 1958///
CY  - New York
PB  - John Wiley & Sons
KW  - Difference equations
KW  - Social sciences
KW  - Mathematical models
N1  - Includes index; Bibliography : p. 246-247
ER  -