000 00257nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aBharat Sarkar
245 0 _aSeekhna: Ek vaigyanik vivechan
260 _aNew Delhi
_bMinistry of Education
_c1976
942 _cBK
999 _c3720
_d3720