Col Reference --- --------- R1 Phelps R.L., et al. 1994, Astron. J. 107, 1079 R2 Carraro G. et al. 1995, Astron. Astrophys. 300, 128 Back to the form
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R1 Phelps R.L., et al. 1994, Astron. J. 107, 1079
R2 Carraro G. et al. 1995, Astron. Astrophys. 300, 128