00450nam a2200133Ia 4500008004100000040001700041082002400058100002000082245006800102260004000170300001500210440005800225650003300283190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta324.24bP274S  aParten, Mildred 0aSurveys, polls and samplebpractical procedurescMildred Parten  aNew YorkbHarper and Brothersc1950  axii, 624p.  aHarper's social science series/ed. by F Stuart Chapin  aSocial surveys-United States