000 00354nam a2200133Ia 4500
001 15355
008 170722s9999 xx 000 0 und d
100 _aPetrovsky, I. G.
245 _aLectures on partial differential equations tr by A Shenitzer /
260 _c1962.
653 _aMathematics
653 _aPartial Differential Equation
942 _cGEN
999 _c63582
_d63582