00301nam a22001217a 4500082001700000100002600017245003700043250001200080260003400092300001100126654001600137700002600153  a001.422bHIL  aHill, Austin Bradford  aPrinciples of medical statistics  a8th ed.  aLondonbThe Lancet Ltd.c1967  a381 p.  aStatistics   aHill, Austin Bradford