000 00254nam a2200109Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aJAIN (VIBHA)
245 0 _aT.B. OF APPLIED PHYSICS
250 _a2ND
260 _bN.DELHI, DHANPAT RAI
942 _2ddc
999 _c99498
_d99498