00957nam2-2200337---450-99000326367020331620090605083159.0000326367USA01000326367(ALEPH)000326367USA0100032636720090605d1972----km-y0itay50------baengUS||||||||001yyPerturbation theoryYusuke HagiharaCambridgeThe MIT press19722 v.23 cm<<Part I:>> XVII, 504 p. - <<Part. II:>> XV, 919 p.Meccanica celeste521HAGIHARA,Yusuke604654ITsalbcISBD990003263670203316521 HAG 2 (I)15548/CBS52100221636521 HAG 2 (II)15549/CBS52100221656BKSCIRSIAV69020090605USA010831Perturbation theory1118863UNISA