000 00274nam a2200121Ia 4500
008 230223s9999 xx 000 0 und d
082 _a20/1997
100 _aRitu Garg
245 0 _aCentre For Astronomy, Delhi
260 _c1997
502 _cProf. Nehru Lal
942 _cTH
999 _c22283
_d22283