000 00392nam a2200133Ia 4500
008 210917s9999 xx 000 0 und d
082 _a004 .D1:52
100 _aDigit June 2020,
245 0 _aSCIENCE TOOLKIT
260 _aNew Delhi
260 _b Digit
260 _c2020
942 _cCD
999 _c154034
_d154034