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100   $a20030910d1961----km-y0itay50------ba
101 0 $aeng
102   $aUS
105   $ay-------001yy
200 1 $aProductivity trends in the United States$fby John W. Kendrick$gassisted by Maude R. Pech
210   $aPrinceton$cPrinceton University Press$d1961.
215   $aLII, 630 p.$d24 cm
225 1 $aGeneral series$fNational Bureau of Economic Research$v71
610 0 $aEconomia
610 0 $aProduttivitą
610 0 $aStati Uniti
610 0 $aEconomia
676   $aF/1.221
676   $aG/1.1
676   $aG/1.2
700  1$aKendrick,$bJohn W.$0103375
702  1$aPech,$bMaude R.
801  0$aIT$bUNINA$gRICA$2UNIMARC
901   $aBK
912   $a990002534780403321
952   $aXXV-C-20$b1950$fMAS
952   $aG/1.2 KEN$b021142$fSES
952   $aG/1.2 KEN$b024005/F$fSES
952   $aXXV-C-21$b1931$fMAS
952   $aXV C 69 (71)$b66736$fFGBC
959   $aMAS
959   $aFGBC
959   $aSES
996   $aProductivity trends in the United States$9438138
997   $aUNINA