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*1001 $aAdams, James D.$0(NO-TrBIB)2055444$_37421200
*24510$aR&D sourcing, joint ventures and innovation :$ba multiple indicators approach$cJames D. Adams, Mircea Marcu
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2004
*300  $a34 s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v10474
*7001 $aMarcu, Mircea$0(NO-TrBIB)4050961$_103743500
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