000 00298nam a2200121Ia 4500
008 220201s1971 xx 000 0 eng d
082 _a0
_bAGA
100 _aAggarwal,N.C.
245 0 _avyavsaik sangathan ka saral Adhyayan /
260 _bDelhi Publication House
_c1971
300 _a644
942 _2ddc
999 _c366
_d366