00309cam a22000977a 4500008004000000082001600040100001900056245007000075260005700145300000900202180718b1969   xxu||||| |||| 00| 0 eng d  aR112x71 C16  aPenz, G. Peter  aStructural unemployment : theory and meaurementcby G. Peter Penz  aCanadabDepartment Of manpower And Immigrationc1969  a91p.