000 00248nam a2200109Ia 4500
008 211209s1961 xx 000 0 und d
041 _aeng
082 _a515.35 N61 DIW/AGA
100 _aDIWAN G S
245 _aDIFFERENTIAL EQUATIONS
260 _c1961
999 _c2703
_d2703