000 00295nam a2200121Ia 4500
008 230413s9999||||xx |||||||||||||| ||und||
082 _a49LY
100 _aLyusternik, L. A.
245 0 _aShortest paths. Variational problems
260 _bThe Macmillan Company
260 _c1964
942 _cBooks
999 _c1631
_d1631