000 | 00316nam a22000977a 4500 | ||
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008 | 210224b ||||| |||| 00| 0 eng d | ||
050 | _aQA401 .T93 | ||
245 |
_aPartial differential equations of mathematical physics _cTYCHONOV, A.N. |
||
260 |
_aLONDON _bHOLDEN-DAY _c1964 |
||
942 |
_2lcc _hQA401 .T93 1964 |
||
999 |
_c635 _d635 |