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1996Natur.380...47D - Nature, 380, 47-49 (1996)
Measurement of the opacity of ionized helium in the intergalactic medium.
DAVIDSEN A.F., KRISS G.A. and ZHENG W.
Journal keyword(s):
CDS comments: HS 1700+64 = HS 1700+6416
Simbad objects: 3
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