000 00342nam a2200145Ia 4500
008 210517s2020 xx 000 0 und d
041 _aeng
082 _a515.35
100 _aRao k s
245 _aIntroducation Partial Differential Equations
250 _a3rd
260 _bPHI learing
_c2020
300 _a488
650 _aMathematics
999 _c285645
_d285645