00838nam0-22002891i-450-99000052719040332120070507133829.0000052719FED01000052719(Aleph)000052719FED0100005271920020821d1962----km-y0itay50------baenga-------001yyFormal structure of electromagneticsgeneral covariance and electromagneticsE. J. Post.AmsterdamNorth-Holland1962XIV, 204 p.21 cmElettromagnetismo574.191'7Post,E. J.51978ITUNINARICAUNIMARCBK99000052719040332110 B I 522CCE 450DINELDINELFormal structure of electromagnetics328777UNINA