000 00297nam a2200121Ia 4500
005 20250516203331.0
008 250516s9999 xx 000 0 und d
041 _aeng
100 _aDatta, Shri Chandra
245 _aChar Vaigyanik Upnyas
260 _aNew Delhi
_bBharisan
_c1994
300 _a104 p.
999 _c68998
_d68998