00325nam a2200121Ia 4500008004100000041000800041082001400049100002300063245003700086260003900123300002900162365001200191240624s9999    xx            000 0 und d  aeng  a519.5 WEI  aWEISBERG HERBERT F  aCENTRAL TENDENCY AND VARIABILITY  c1992aNew DelhibSage Publications  avi, : 89 : p. : cm. ; 21  cBPSb30