*001128066 *00520250613174144.0 *007ta *008020429s1996 xxu 000 u eng d *00900818cam a22002177c 4500 *019 $bl *035 $a(EXLNZ-47BIBSYS_NETWORK)990209504704702201 *035 $a(NO-LaBS)14691417(bibid) *035 $a(NO-TrBIB)020950470 *035 $a020950470-47bibsys_network *040 $aNO-TrBIB$bnob$ekatreg *24500$aUnited States Steel's acquisition of the Great Northern Ore Properties :$bvertical foreclosure or efficient contractual governance? *260 $aCambridge, Mass.$bNBER$c1996 *300 $a73 s. *4901 $aNBER working paper series$v5662 *7001 $aMullin, Joseph C.$_34403600 *7001 $aMullin, Wallace P.$_34403700 *7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800 *830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v5662$w999105437124702201$_13074900 *901 $a60 *999 $aoai:nb.bibsys.no:990209504704702202$b2021-11-14T19:50:42Z$z990209504704702202 ^