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Intergalactic HeII absorption towards QSO 1157+3143

D. Reimers, C. Fechner, H.-J. Hagen, P. Jakobsen, D. Tytler and D. Kirkman

A&A, 442 1 (2005) 63-68

DOI: https://doi.org/10.1051/0004-6361:20053365

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