LEADER 00773nam0-22002531i-450- 001 990002676990403321 035 $a000267699 035 $aFED01000267699 035 $a(Aleph)000267699FED01 035 $a000267699 100 $a20000920d1967----km-y0itay50------ba 101 1$aENG 200 1 $aProductivity differences within the servicesector.$fde Fuchs V. e Wilburn J. 210 $aNew York$cNational Bureau of Economic Research$d1967 700 1$aFuchs,$bVictor R.$f<1924- >$046998 702 1$aWilburn,$bJean Alexander 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990002676990403321 952 $a12-7-11$bs.i.$fECA 959 $aECA 996 $aProductivity differences within the servicesector$9428257 997 $aUNINA DB $aING01