000 00368nam a2200145Ia 4500
008 190601s9999 xx 000 0 und d
020 _a_
082 _a515.353
_bPET
100 _aPetrovskii, I.G.
245 0 _aPartial differential equations
260 _aLondon
_bIliffe Books
_c1967
300 _a410 p.
650 _aPartial differential equations
942 _cS
999 _c120385
_d120384