00835nam0-22003011i-450 99000083171040332120190329121111.0000083171FED01000083171(Aleph)000083171FED0100008317120001010d1970----km-y0itay50------baengy-------001yy<<The >>variational principles mechanicsC. Lanczos4. ed.TorontoUniversity of Toronto1970XXIX, 418 p.22 cmMathematical expositions4Lanczos,Cornelius27778ITUNINARICAUNIMARCBK99000083171040332102 65 B 82845FINBNFINBNVariational principles mechanics348265UNINAING01