Col Reference --- --------- R1 Becker W., et al. 1976, Basle catalogue R2 Eggen O.J. 1968, Astrophys. J 152, 83 R3 McClure R.D. 1972, Astrophys. J. 172, 615 Back to the form
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R1 Becker W., et al. 1976, Basle catalogue
R2 Eggen O.J. 1968, Astrophys. J 152, 83
R3 McClure R.D. 1972, Astrophys. J. 172, 615