Papers.
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Hartmann, J. (Johannes), 1865-1936
http://n2t.net/ark:/99166/w6hf0pgh (person)
German astronomer. Studied Universities of Tübingen, Berlin, Leipzig (Ph. D. 1891); Leipzig Observatory, 1891-1896; Astrophysical Observatory Potsdam, 1896-1909; professor 1902; University of Göttingen: professor 1909-1926. Director, La-Plata (Argentina) Observatory, 1921-1935. From the description of Papers. (Unknown). WorldCat record id: 80044103 ...