00292nam 2212175 450000100060000000300230000600500090002900800410003808200110007910000270009026000000011724500550011712175StarLibrary Marc Built20181109201711 ||||| |||||||||||amh  a001.36 aMOUSTAFA A. EL KHAWAGA aPRINCIPLESAND CONCEPTS OF STATISTICS OF STATISTICS