000			00285nam a2200109 4500
245			_aElementary differential equations _cLyman M. Kells
100			_aKells, Lyman M.
250			_a6th ed.
260			_aNew York _bMcGraw - Hill _c1965
300			_axii,430p.; 21cm.
082			_a515.35 _bKEL
999			_c22169 _d22169