TY  - BOOK
AU  - Day,Ralph L.
AU  - Parsons,Leonard
TI  - Marketing models: quantitative applications 
SN  - 0700223177
PY  - 1971///
CY  - New York, N.Y.
PB  - Intext Educatioaln Publishers
KW  - Marketing
KW  - Quantitative methods
N1  - Includes index
ER  -