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100   $a20011026d1967----km-y0itay50------ba
101 0 $aeng
102   $aUS
105   $ay-------001yy
200 1 $aProductivity differences within the service sector$fVictor R. Fuchs, Jean Alexander Wilburn
210   $aNew York$cNational Bureau of Economic Research$d1967
215   $aXIII, 109 p.$d24 cm
225 1 $aOccasional paper$fNational bureau of economic research$v102
676   $a331.118$v20$zita
700  1$aFuchs,$bVictor R.$f<1924- >$046998
701  1$aWilburn,$bJean Alexander$0257025
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