000 00307nam a2200121Ia 45e0
008 181001s1971 xx 000 0 und d
100 _aRay &
245 0 _aText book of dimentials equations
260 _bStudents Friends
_c1971
300 _a399
700 _aSharma
942 _2ddc
_cBK
999 _c2242
_d2242