00370nam a2200133 a 450000500170000002000150001708200170003210000210004924500380007026000360010830000200014449000490016470000230021320251203110235.0  a0803933908  a300.723bSTE  aStewart, David W  aFocus groupsbtheory and practice  aLondonbSage publicationsc1990  a152p.c22cm PB.  aApplied social research methods seriesdv.20  aShamdasani, Prem N