TY  - BOOK
AU  - Tull,Donald S.
AU  - Hawkins,Del I.
TI  - Marketing research: measurement and method : a text with cases 
SN  - 0029796407
U1  - 658.83 21
PY  - 1980///].
CY  - New York: 
PB  - Macmillan, 
KW  - Marketing research
KW  - Case studies
N1  - Includes bibliographical references and index
ER  -