000			00305nam a2200133Ia 4500
005			20260205040145.0
008			260111s9999||||xx |||||||||||||| ||und||
082			_a517.38 N331D
100			_aNELSON ALFRED L
245		0	_aDIFFERENTIAL EQUATIONS
260			_bD.C.HEATH _c1952
300			_a299
942			_cBK
999			_c878 _d878