Successful focus groups :
Successful focus groups : advancing the state of the art /
ed. David L. Morgan.
- Newbury Park, Calif. : Sage, 1993.
- xv, 271 p. ; 22 cm.
- A Sage Focus Edition ; 156. .
0-8039-4874-3
H61.28 / S82
0-8039-4874-3
H61.28 / S82
