01023nam a2200301 i 450099100105024970753620020507105716.0940316s1977 de ||| | eng b10166488-39ule_instLE00641292ExLDip.to Fisicaita523.1/1252.9.5553(06)LC QB857Rohlfs, Kristen48643Lectures on density wave theory /K. RohlfsBerlin :Springer-Verlag,1977vi, 184 p. :ill. ;25 cmLecture notes in physics / edited by J. Ehlers...[et al.] ;69Density wave theoryGalaxies.b1016648817-02-1727-06-02991001050249707536LE006 52.9.53+52.9.55 ROH12006000028783le006-E0.00-l- 00000.i1020294827-06-02Lectures on density wave theory188141UNISALENTOle00601-01-94ma -engde 01