Columbia subject headings:
Harvard subject headings:
Group work in research.
Lazarsfeld, Paul Felix, 1901-1976.
Mass media--Research--Methodology
Merton, Robert King, 1910-2003.
Princeton subject headings:
Communication--Research--Methodology.
Focus groups.
Interviewing in sociology.
Lazarsfeld, Paul F., 1901-1976.
Marketing research.
Merton, Robert King, 1910-2003.
Sociology--Research--Methodology.