00321nam a2200109Ia 4500008004100000040003800041100001600079245003700095260004500132300001800177653001600195211214s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aHansen, M H 0aSample survey methods and theory  bJOHN WIELY AND SONS, INCaNEW YORKc1953  aXIII,332 P p.  aMATHEMATICS