LEADER 00757nam0-22002651i-450- 001 990001147250403321 035 $a000114725 035 $aFED01000114725 035 $a(Aleph)000114725FED01 035 $a000114725 100 $a20000920d1989----km-y0itay50------ba 101 1$aeng 200 1 $aGroups acting on graphs$fby Dicks and Dunw oody 210 $aCambridge [etc.]$cCambridge University Press$d1989 225 1 $aCambridge studies in advanced mathematics$v17 700 1$aDicks,$bWarren$054907 702 1$aDunwoody,$bM.J. 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990001147250403321 952 $aC-43-(17$b5228$fMA1 959 $aMA1 996 $aGroups acting on graphs$9344569 997 $aUNINA DB $aING01 LEADER 01386nam 2200349 450 001 996279426803316 005 20231206214115.0 010 $a1-5044-0338-X 024 7 $a10.1109/IEEESTD.1972.7419180 035 $a(CKB)3710000000601317 035 $a(NjHacI)993710000000601317 035 $a(EXLCZ)993710000000601317 100 $a20231206d1972 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aIEEE Std 421-1972 $eIEEE Standard Criteria and Definitions for Excitation Systems for Synchronous Machines /$fInstitute of Electrical and Electronics Engineers 210 1$aNew York, N.Y. :$cIEEE,$d1972. 215 $a1 online resource (20 pages) $cillustrations 330 $aThis document presents criteria, essential elements, and new and revised definitions for excitation systems as applied to electric utility synchronous machines with particular emphasis given to the application of solid-state devices and to terminology common to feedback control systems. 517 $aIEEE Std 421-1972 606 $aElectric machinery, Synchronous 615 0$aElectric machinery, Synchronous. 676 $a621.3133 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a996279426803316 996 $aIEEE Std 421-1972$93646826 997 $aUNISA