000 00241nam a2200097Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aGAUR (RK) & GUPTA (SL)
245 0 _aENGINEERING PHYSICS
260 _bDHANPAT RAI NEW DELHI
942 _2ddc
999 _c99893
_d99893