Titlebook: Wechselstrom-Leistungsmessungen; Werner Skirl Book 1930Latest edition Verlag von Julius Springer 1930 Berechnung.Ebene.Entwicklung.Konstan

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Werner Skirlrly sixties, of the ?rst radio galaxies and quasars. After a few decades of debate there is now a clear consensus about the source of energy in AGN, namely gravitational energy released through matter accretion onto a massive black hole. The most commonly accepted ideas regarding AGN are pictured in