00305nam a2200145Ia 4500020001500000082002300015100002300038245002800061250000800089260003000097300000600127500001600133500000500149700000500154  a1555443761  a518.5425bSa252.SS  aSAS Institute Inc.  aSAS/STAT user's guideb  a4th  aNorth CarolinabSASc1990  a   a"Version 6"  a  a