000 00272nam a2200121Ia 4500
008 230413s9999||||xx |||||||||||||| ||und||
082 _a49EL
100 _aGelfand, I.M; Fomin, S.V
245 0 _acalculus of variations
260 _bDover
260 _c2007
942 _cBooks
999 _c1939
_d1939