000 00267nam a2200109Ia 4500
008 160710s1964 xx 000 0 und d
100 _aBETZ, H.
245 _aDIFFERENTIAL EQUATIONS WITH APPLICATION
260 _aN.Y.
_bHARPAR
_c1964
300 _a354
942 _2ddc
_cB
999 _c30390
_d30390