000 00285nam a2200109Ia 45e0
008 181001s1951 xx 000 0 und d
100 _aBarrows W.E.
245 0 _aLight, photometry & Illuminating Engg.
260 _bMcGraw Hill
_c1951
300 _a415
942 _2ddc
_cBK
999 _c1433
_d1433