000 00312nam a2200133Ia 4500
008 220204s9999 xx 000 0 und d
020 _a0070017131
082 _a53:62
_bPHY.13
100 _aAldridge, Bill G
245 4 _aThe Laser
260 _aNew Delhi
_bMcGraw-Hill Co
_c1975
300 _a60p.
942 _cBK
999 _c31618
_d31618