000			00287nam a2200121 4500
008			160616s 000 0
245			_aDiscussion on refraction of light
100			_aTarasov, L.V.
100			_aTarasova, A.N
500			_aC51 M44
942			_cBK _2BK9317
080			_a535 TAR
999			_c9317 _d9317