00690nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001700084100002100101245009800122260003400220300001000254650004100264650003100305650002300336942000700359999001500366952010300381IN-BaIIA211028s9999    xx            000 0 eng d  a3-540-08448-7  cIIA Library  a524.7-8bROH  aRohlfs, K910284 0aLectures on density wave theorycK. Rohlfs                                                     aBerlinbSpringer-Verlagc1977  a184p.  aAstronomy and astrophysics thesaurus  aDensity wave theory910285  aWave theory910286  cBK  c5931d5931  00104070aBANbBANcGENd1978-08-18l0o524.7-8/ ROHp6627r2021-11-05w1978-08-18yBKGDM 18.00