000 00272nam a2200121Ia 4500
999 _c21267
_d21267
020 _a8122404014
100 _aRaj Kamal
245 _aLaser Optics
260 _c1992
_bWILEY EASTERN
_aNew Delhi
300 _axv+286
700 _aMaheshwari K P
_aSawhney R L
942 _cBB