TY  - BOOK
AU  - "Tull, Donald S."
AU  - "Hawkin, Del I."
TI  - Marketing research: measurement & method
SN  - 0-02-421932-0
U1  - 658.8072 
PY  - 1993///
CY  - U.S.A.
PB  - Macmillan Publishing Company
ER  -