000 00267nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aY K Bhushan/ O P Aggarwal
245 0 _aVyavasaay sangathan siddhant awam karyapaddhatti
260 _aDelhi
_bS Chand
_c1971
942 _cBK
999 _c788
_d788