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100   $a20120408d1971      ua             0
101 0 $aeng
135   $aurbn||||||abp
135   $aurbn||||||ada
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aFeedback mechanisms in the historical collections of the National Museum of History and Technology$b[electronic resource] /$fby Otto Mayr
210  1$aWashington, [D.C.] :$cSmithsonian Institution Press,$d1971.
215   $a1 online resource (x, 133 pages) $cillustrations
225 1 $aSmithsonian studies in history and technology ;$vno. 12
300   $aTitle from title screen (viewed on Apr. 20, 2012).
320   $aIncludes bibliographical references and index.
606   $aFeedback control systems$xHistory
606   $aGovernors (Machinery)$xHistory
615  0$aFeedback control systems$xHistory.
615  0$aGovernors (Machinery)$xHistory.
700   $aMayr$b Otto$011758
712 02$aSmithsonian Institution.
801  0$bOCLCE
801  1$bOCLCE
801  2$bGPO
906   $aBOOK
912   $a9910701486503321
996   $aFeedback mechanisms in the historical collections of the National Museum of History and Technology$93535536
997   $aUNINA