00958nam2-2200337---450-99000328244020331620090626125107.0000328244USA01000328244(ALEPH)000328244USA0100032824420090626d1977----km-y0itay50------baengDE||||||||001yyLectures on density wave theoryK. RohlfsBerlinSpringercopyr. 1977184 p.ill.24 cmLecture notes in physics690010003151052001Lecture notes in physics69Astronomia teorica521ROHLFS,K.48643ITsalbcISBD990003282440203316530 LNP (69)2973/CBS53000224067BKSCIRSIAV79020090626USA011251Lectures on density wave theory188141UNISA