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200 1 $aIntroduction to servomechanisms$fby A. Porter
210   $aLondon$cMethuen$d1950
215   $aVI, 154 p.$d17 cm
225 2 $aMethuens monographs on physical subjects
410  0$12001$aMethuens monographs on physical subjects
500 10$aIntroduction to servomechanisms$946940
610 1 $aServomeccanismi
676   $a629.8$v21$9Ingegneria dei controlli automatici
700  1$aPorter,$bA.$0347094
801  0$aIT$bUNIPARTHENOPE$c20090123$gRICA$2UNIMARC
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951   $aS 629.8/5$bS A, 157$cDSA$d2009
996   $aIntroduction to servomechanisms$946940
997   $aUNIPARTHENOPE