000			00337nam a2200121Ia 4500
008			211209s1971 xx 000 0 und d
041			_aeng
082			_a515.62 N71 MAR
100			_aMARRY R, SPIEGEL
245			_aSCHAUM'S THEORY AND PROBLEMS OF CALCULUS FINITE DIFFERENCES AND DIFFERENCIAL EQUATIONS
260			_c1971
300			_a259
999			_c13755 _d13755