HD 227402

Photographic measures of double stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...34..403D&db_key=AST
A study of visual binaries having primaries above the main sequence. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1960AJ.....65...60S&db_key=AST
Stellar Spectra and Colors in a Clear Region in Cygnus. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1949ApJ...110..478N&db_key=AST

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