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*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990210319754702201
*035  $a(NO-LaBS)14134624(bibid)
*035  $a(NO-TrBIB)021031975
*035  $a021031975-47bibsys_network
*040  $aNO-TrBIB$bnob$ekatreg
*24500$aIntermedia substitutability and market demand by national advertisers$cAlvin J. Silk, Lisa R. Klein, Ernst R. Berndt
*260  $aCambridge, Mass.$bNBER$c2001
*300  $a57 s.
*4901 $aNBER working paper series$v8624
*7001 $aBerndt, Ernst R.$_51819000
*7001 $aKlein, Lisa R.$_109425300
*7001 $aSilk, Alvin J$_109425400
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v8624$w999105437124702201$_13074900
*901  $a60
*999  $aoai:nb.bibsys.no:990210319754702202$b2021-11-14T20:52:44Z$z990210319754702202
^