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*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990209446754702201
*035  $a(NO-LaBS)15210897(bibid)
*035  $a(NO-TrBIB)020944675
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*040  $aNO-TrBIB$bnob$ekatreg
*24500$aAre brothers really better? :$bsibling sex composition and educational achievement revisited
*260  $aCambridge, Mass.$bNBER$c1996
*300  $a25,[9] s.
*4901 $aNBER working paper series$vno. 5521
*7001 $aKaestner, Robert$_30079400
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$vno. 5521$w999105437124702201$_13074900
*901  $a60
*999  $aoai:nb.bibsys.no:990209446754702202$b2021-11-14T20:20:52Z$z990209446754702202
^