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167 Series 220 Sc U [[underlined]] April 3, 1914 [[/underlined]] John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics * Provided by the NASA Astrophysics Data System John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics * Provided by the NASA Astrophysics Data System John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics * Provided by the NASA Astrophysics Data System