*001376770
*00520020528174104.0
*007ta
*008020528s1997    xx#           000 u eng d
*00900673cam a2200193 c 4500
*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990209752604702201
*035  $a(NO-LaBS)13850226(bibid)
*035  $a(NO-TrBIB)020975260
*035  $a020975260-47bibsys_network
*040  $aNO-TrBIB$bnob$ekatreg
*1001 $aHelpman, Elhanan$0(NO-TrBIB)90269017$_16033100
*24510$aR&D and productivity :$bthe international connection$cElhanan Helpman
*260  $aCambridge, England$bNational Bureau of Economic Reseach$c1997
*300  $a22 s.
*4901 $aNBER working paper series$v6101
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v6101$w999105437124702201$_13074900
*901  $a80
*999  $aoai:nb.bibsys.no:990209752604702202$b2021-11-14T20:15:30Z$z990209752604702202
^