000			00326nam a2200121Ia 4500
005			20251007104300.0
008			251006s9999 xx 000 0 und d
100			_akells,lyman morse,1888-
245		0	_aelementary differential equations lyman morse kells
260			_a6th.ed. | N.Y. Graw-Hill
260			_c1965
942			_cBOK
999			_c4018 _d4018