00333nam a2200109Ia 4500008004100000040003800041100001700079245004300096260004600139300001900185653001900204220107s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aMoser, Claus 0aSurvey methods in social investigation  bHeinemann Educational BooksaLondonc1974  axviii, 549p p.  aSocial serveys