00486nam a2200181 a 450000500170000002000150001708200180003210000170005024500310006725000110009826000370010930000210014669000180016796400210018599700180020699900170022495200630024120251203091611.0  a0044457227  a300.723,bvau  aVaus, D.A.de  aSurveys in social research  a2nd ed  aLoNew Delhion: Unwin Hymanc1986  axiv, 343p.c22cm  aSocial survey  bEngcdefgPUL  a56513 LIBSS C  c45945d45945  00104070aPUbPUd1998-04-08l0o300.723, vaup56513yBK