000 00431nam a2200169Ia 4500
001 42768
003 CONS
008 171214s9999 xx 000 0 eng d
041 0 _aeng
082 0 4 _a517.97
100 1 _aLanczos C.
245 1 4 _aThe variational principles of mechanics.
_cLanczos C.
260 _aToronto
_bToronto University Press
_c1949
300 _a332 p.
500 _aMathematical expositions, N 4
942 _2udc
_cBK
999 _c42411
_d42411