00955nam0-22003611i-450-99000102340040332120060710160003.03-540-08448-7000102340FED01000102340(Aleph)000102340FED0100010234020001205d1977----km-y0itay50------baengDEa---a---001yyLectures on density wave theoryK. RohlfsBerlin [etc.]Springer-Verlag1977184 p.ill.24 cmLecture notes in physics69AstronomiaAstrofisicaCosmologiaRohlfs,Kristen48643ITUNINARICAUNIMARCBK99000102340040332119-124.001FI119-12410735FI1FI1DRCNLectures on density wave theory188141UNINA