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200 1 $a<<A >>Model Survey of Computer Services$fUnited Nations Department of International Economic and Social Affairs Statistical Office.
210   $aNew York$cUnited Nations$d1991.
215   $aIV, 36 p.$d26 cm
225 1 $aStatistical papers$v91
610 0 $aPianificazioni di indagini, Tecniche di rilevazione
710 11$aNazioni Unite.$bDepartment of Economic and Social Affairs$0493245
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