000			00287nam a2200133Ia 4500
008			211209s1981 xx 000 0 und d
041			_aeng
082			_a515.35 N81 BAL
100			_aBALI N P
245			_aDIFFERENTIAL EQUATIONS
250			_a5 ed.
260			_c1981
300			_a315
999			_c10959 _d10959