TY  - BOOK
AU  - Tull Donald S
AU  -  Hawkins Del I
TI  - Marketing research:  Measurement and methods   
SN  - 0024217603
U1  - X:51b4, L6,M0/TD3 
PY  - 1980///
CY  - New York
PB  - Macmillan         
KW  - Marketing
N1  - Published previously as Marketing  research: Meaning, measurement and method
ER  -