000 00260nam a2200121 a 4500
003 EIA
001 5496
942 _02
_2ddc
_cBK
245 _aUnderstanding statistics
260 _cc1972
008 141112s1972 ck r 000 u spa d
082 _a519.5
_bN157u
999 _c13552
_d13552