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020 _a9788120335349
037 _bRAB18-05-2018
041 _aeng
100 _aMangal, S. K.
245 0 _aTeaching of social studies/
_cS. K. Mangal
260 _aDelhi:
_bPHI Learning Private Limited,
_c2015
300 _axvi, 456p.
650 _aSocial Studies-Study and Teaching
942 _cBK