cam a22 u 4500 074100467 CHVBK 20190412220314.0 910328s1991 xxu 00 eng d (OCoLC)917324225 (IDSBB)000686629 SzZuIDS BS/BE A125 ger kids 330 15 Morrison Catherine J. Assessing the productivity of information technology equipment in U. S. manufacturing industries Catherine J. Morrison, Ernst R. Berndt Cambridge, MA NBER 1991 21 S. 23 cm Text txt rdacontent/ger ohne Hilfsmittel zu benutzen n rdamedia/ger Band nc rdacarrier/ger Working paper series / National Bureau of Economic Research No. 3582 3582 (IDSBB)000181660 117078786 Berndt Ernst R. (DE-588)128550783 vw SzZuIDS BS/BE IDSBB 100 1- Morrison Catherine J. IDSBB 490 0- Working paper series / National Bureau of Economic Research No. 3582 3582 (IDSBB)000181660 117078786 IDSBB 700 1- Berndt Ernst R. (DE-588)128550783 SWISSBIB 074100467 BK020000 XK020000 XK020000 IDSBB A125 A125 125MZ UBW Zo 921 : 3582 Akz: ba/iivw/k