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*035  $a(EXLNZ-47BIBSYS_NETWORK)990209429234702201
*035  $a(NO-LaBS)14121517(bibid)
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*1001 $aFreeman, Richard B.$0(NO-TrBIB)90259381$_35725300
*24510$aWorking for nothing :$bthe supply of volunteer labor$cRichard B. Freeman
*260  $aCambridge, Mass.$bNBER$c1996
*300  $a41 s.
*4901 $aNBER working paper series$vno. 5435
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$vno. 5435$w999105437124702201$_13074900
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*999  $aoai:nb.bibsys.no:990209429234702202$b2021-11-14T21:06:27Z$z990209429234702202
^