00414cam a22001217a 4500008004000000020001600040082001600056100001900072245012500091260005000216300000900266700001700275180718b1972   xxu||||| |||| 00| 0 eng d  a11 340115 9  aQ93x42 Un3c  aClarke, R.V.G.  aControlled trial in institutional research : paradigm or pitfall for penal evaluators?cby R.V.G.Clarke And D.B. Cornish  aLondonbHer Majesty's Stationery Officec1972  a32p.  aCornish, D.B