HD 53507

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
Red and Infrared Magnitudes for 138 Stars Observed as Photometric Standards. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1953ApJ...118..502K&db_key=AST
The Transfer of the North Polar Standards to the Southern Hemisphere. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1953ApJ...117...83C&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

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