000 00439nam a2200145Ia 4500
008 211115s9999 xx 000 0 und d
041 _aeng
082 _aB80J313N
_bK4
100 _aHellwig, Gunter.
245 0 _aDifferential Operators of Mathematical Physics :Introduction /
260 _aLondon :
_bAddison-Wesley Publishing Company ,
_c1985
300 _avii, 296p ;
650 _aMathematics <Mathematical Physics>
942 _cTB
999 _c25548
_d25548