Col Reference --- --------- R1 Delgado A.J., et al. 1994, Astron. J. 108, 2193 R2 Alfaro E.J., et al. 1992, Astron. J. 103, 204 Back to the form
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R1 Delgado A.J., et al. 1994, Astron. J. 108, 2193
R2 Alfaro E.J., et al. 1992, Astron. J. 103, 204