000 00545nam a2200217Ia 4500
003 OSt
005 20220928142232.0
006 a|||||r|||| 00| 0
007 ta
008 220927b |||||||| |||| 00| 0 eng d
024 _a18928
037 _cTextual
040 _aSDCL
_cSDCL
_beng
041 _2eng
_aeng
082 _aB43, K7
100 _aHellwig Gunter
_9503091
245 0 _aDifferential operators of mathematical physics.
260 _c1967
942 _hB43, K7
_cTEXL
_2CC
999 _c821131
_d821131