000 00302nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a510
100 _aTychanov A N
245 0 _aPractical Differential Equations of Mathematical Physics
250 _a2
260 _bHoldon - Day
_c1970
942 _cBK
999 _c33216
_d33216