00422nam a2200145Ia 4500008004100000100001500041245007100056260001200127300000600139362000900145490000600154500000700160710005300167773005600220260227b        |||||||| |||| 00| 0 eng d  aKnight, R.  aChanges in the occupational structure of the working populationb/  a b c   a   a1967  v3  a21  aLondon School of Economics and Political Science  tJournal of the Royal Statistical Society - Series A