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003 OSt
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006 a|||||r|||| 00| 0
007 ta
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024 _a71122
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aB3340C, J7
100 _aSommerfeld Arnold
245 0 _aPartial differential equations in physics
260 _c1957
300 _ap.
_ccm.
650 _aMathematics
942 _hB3340C, J7
_cTEXL
_2CC
999 _c34806
_d34806