000 00334nam a2200133Ia 4500
008 211228s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aRay,Sidney F
245 0 _aLens and all its jobs
260 _bFocal Press
_aLondon
_c1977
300 _a158p p.
653 _aLenses
942 _c1
999 _c200863
_d200863