000 00312nam a2200121Ia 4500
008 210212s9999||||xx |||||||||||||| ||und||
082 _a4H0.5409 Cho. L9
100 _aChoudhary ,Satya dev
245 0 _aBhartiya shaiy vigyan
260 _c1979
_bAlankar prakashan
_aDelhi
300 _a423p.
942 _cSU
999 _c79647
_d79647