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1 Introduction
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2 Galactic and LMC remnants
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3 The Ly  /Ly
and Ly/H
ratios
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4 Results
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5 Discussion
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References
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Online Material
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Appendix A: Ratio of Einstein A-coefficients
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Appendix B: Atomic cross-sections
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Appendix C: Broad emission from within the shock front?
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