TY  - BOOK
AU  - Goldberg,Samuel
TI  - Introduction to difference equations,: with illustrative examples from economics, psychology, and sociology 
AV  - QA431 
PY  - 1958///]
CY  - New York
PB  - Wiley
KW  - Difference equations
KW  - Social sciences
KW  - Mathematical models
ER  -