00258nam a2200109Ia 4500008004100000100001600041245003500057260001600092650001600108942000700124999001700131190216s9999||||xx |||||||||||||| ||und||  aElhance D N 0aPractical Problem In Statitics  bKitab Mahal  aMathematics  cBK  c30720d30720