00295nam a2200109Ia 450000500170000000800410001708200140005810000190007224500450009126000410013630000080017720260224040957.0260224s9999||||xx |||||||||||||| ||und||  a311.2 STE  aSteel, R.G.D.  0aPrinciples and procedures of statistics   aNew York: Mc-Graw-Hill Book Coc1960  a481