000 00258nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aprasad(k.d)
245 0 _aantEENA & wave propagation
250 _aIV th
260 _bSATYA PRAKASHAN
942 _2ddc
_cBTECH
999 _c6067
_d6067