000 00259nam a2200121Ia 4500
008 211209s1971 xx 000 0 und d
041 _aeng
082 _a515.252 N71 CHO
100 _aCHON P M
245 _aLINEAR EQUATIONS
260 _c1971
300 _a75
999 _c12525
_d12525