Col References --- ---------- R1 Phelps R., Janes K.A. 1994, Astrophys. J. Suppl. 90, 31 R2 Hardorp J. 1960, Astr.Abh.Hamburg.Sternw.Bergedorf 5 no 7 Back to the form
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R1 Phelps R., Janes K.A. 1994, Astrophys. J. Suppl. 90, 31
R2 Hardorp J. 1960, Astr.Abh.Hamburg.Sternw.Bergedorf 5 no 7