000 00253nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aS C Saxena
245 0 _aVyavasaik shiksha ke siddhant
250 _a3rd
260 _aAgra
_bSahitya Bhawan
942 _cBK
999 _c505
_d505