000 00246nam a2200121Ia 4500
654 _aMECH
100 _aTudge Colin
245 _aLasers
260 _bMacdonald and Company
_aLondon
_c1973
082 _bTUD
300 _a63p.
999 _c1449
_d1449
300 _c23 cm.
655 _aM-25
041 _aeng
546 _aText in English