00868nam0-22003131i-450-99000047913040332120070508112751.00-486-65067-7000047913FED01000047913(Aleph)000047913FED0100004791320020821d1986----km-y0itay50------baenga-------001yy<<The >>variational principles of mechanicsCornelius Lanczos4th ed.New YorkDover publications1983XXIX, 418 p.ill.21 cmDover books on physics and chemistryMeccanica analitica531.015Lanczos,CorneliusITUNINARICAUNIMARCBK99000047913040332110 B II 358861 DEEDINELDINELUNINA