TY  - BOOK
AU  - Goldberg,Samual, x
AU  - x
TI  - Introduction to difference equations with illustrative examples from economics, psychiology and sociology: x
SN  - x
U1  - 517.6/GOI 
PY  - 1953///
CY  - N.Y.
PB  - Wiley
KW  - Calculus
N1  - x
ER  -