00311nam a2200133Ia 4500082002300000100002200023245001900045260002900064300000600093490004500099500002300144500000500167700000500172  a518.5425bSt797.SG  aStata Corporation  aStata Manualb  aTexasbStata Pressc1995  a   aStatistics, Graphics and data management  a"Stata- Release 4"  a  a