www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/barnard-edward.pdf ; links to obituaries: en.wikipedia.org/wiki/Edward_Emerson_Barnard
William Sheehan: The Immortal Fire Within: Life & Work of E.E.B. (Cambridge 1995) ; National Academy of Sciences Biographical Memoir 21(1927) ; James Mussell: A. C. Ranyard, Knowledge & reproduction of astronomical photographs, in: Brit. J. Hist. Sci. 42 (2009): 368-77 ; Thomas 1997: 193 ; Wilson 2009: 45;
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