HD 217771

Spectral and Luminosity Classification of the Bright Sequence Stars in the C Regions. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1955ApJ...121...32N&db_key=AST
Photoelectric Studies. VIII. Positional Effect in Photomultipliers and Some Revised Magnitudes in the North Polar Sequence and Harvard Region C 12. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1951ApJ...114..141E&db_key=AST
Red and Infrared Magnitudes for 125 Stars in Ten Areas Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1951ApJ...113..324K&db_key=AST
Photoelectric Studies.IV. Color-Luminosity Array for Stars in the Region of the Sun. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1950ApJ...112..141E&db_key=AST

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