000 00309nam a2200133Ia 4500
008 190201s9999 xx 000 0 und d
082 _a515
082 _b352 CO
100 _aCodington
245 0 _aTheory Of Ordinary Diffe
260 _aNew Delhi
260 _btata mcw h.p. co. ltd.
300 _a"xii,429"
999 _c20676
_d20676