00405cam a22001217a 4500008004000000082001600040245008600056260005000142300000800192440005200200700001500252700001600267180718b1971   xxu||||| |||| 00| 0 eng d  aR112x42 Un3  aSeasonal adjustment of unemployment seriescby R.L. Brown, A.H. Cowley, J. Durbin  aLondonbHer Majesty's Stationery Officec1971  a30p  aStudies in Offical Statistics Research Series,4  aDurbin, J.  aCowley, A.H