The Harvard College Observatory, 1839-1919,
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PrintAstrophysics and Twentieth-Century Astronomy to 1950 (Book)
Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520, [email protected]
Smithsonian Institution History Bibliography
General History of AstronomyVol. 4
1984
pp. 122-124