University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H...
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Hipparcos and Tycho Catalogues". Retrieved 2006-12-26. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 2006-12-26. Roman, N...
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London Gazette (Supplement). 8 February 1918. p. 1877. Franks, p. 61. "No. 31327". The London Gazette. 6 May 1919. p. 5656. Franks, Norman (2003). Sopwith...
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