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200 1 $aUnderstanding technical change as an evolutionary process$fRichard R. Nelson
210   $aAmsterdam$cNorth Holland$d1987
215   $aVIII, 125 p.$d20 cm
225 2 $aLectures in economics$v8
410  0$12001$aLectures in economics
500 10$aUnderstanding technical change as an evolutionary process$935054
610 1 $aProgresso tecnico$aAspetti economici
676   $a338.06$v19$9Efficacia produttiva
700  1$aNelson,$bRichard Robinson$0106425
801  0$aIT$bUNIPARTHENOPE$c20090227$gRICA$2UNIMARC
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996   $aUnderstanding technical change as an evolutionary process$935054
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