Col Reference --- --------- R1 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pe) R2 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pg) R3 Glushkova E.V., Uglova I.M. 1997, Astron. Lett. 23, 591 Back to the form
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R1 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pe)
R2 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pg)
R3 Glushkova E.V., Uglova I.M. 1997, Astron. Lett. 23, 591