00374nam a2200133Ia 4500008004100000020001500041082002300056100002300079245002900102250000800131260003800139300002900177490003400206250701b        |||||||| |||| 00| 0 eng d  a0387989676  a519.50184bR813.OS  aRosenbaum, Paul R.  aObservational studiesb/  a2nd  aNew York:bSpringer-Verlag,c2002  axiv, 375p. Bibl., Index.  aSpringer series in Statistics