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WikiPedia: Edward_Emerson_Barnard http://www.springerreference.com/docs/html/chapter... http://adsabs.harvard.edu//full/seri/ApJ../0058//0... http://articles.adsabs.harvard.edu/cgi-bin/nph-iar... http://www.vanderbilt.edu/News/register/Oct29_01/s... https://web.archive.org/web/20070211031623/http://...