000 00268nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aAjay Kumar
245 0 _aVyavsaik sangathan ka saral adhyayan
250 _a2nd
260 _aDelhi
_bDelhi Pub House
_c1971
942 _cBK
999 _c667
_d667