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R. O. Gray, C. J. Corbally, R. F. Garrison, M. T. McFadden, P. E. Robinson: Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I. In: The Astronomical Journal. Bd. 126, Nr. 4, 2003, S. 2048–2059, doi:10.1086/378365 (PDF; 620 kB). VizieR: NStars project: the Northern Sample. I. (Gray+, 2003).
R. O. Gray, C. J. Corbally, R. F. Garrison, M. T. McFadden, P. E. Robinson: Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I. In: The Astronomical Journal. Bd. 126, Nr. 4, 2003, S. 2048–2059, doi:10.1086/378365 (PDF; 620 kB). VizieR: NStars project: the Northern Sample. I. (Gray+, 2003).