000			00309nam a2200145Ia 4500
008			170101s1948 xx 000 0 und d
082			_a536 B30T
100			_aBARTON, A.W.
245		0	_aTextbook on light
260			_aLondon _c1948
300			_a426p
650			_aLIGHT
653			_aLIGHT
942			_2ddc _cB
999			_c716 _d716