Equatorial-Observations, made at the U. S. Naval Observatory at Washington in 1871 by Prof. A. Hall.Published in:Astronomische Nachrichten, 1872, v. 79, n. 7, p. 97, doi. 10.1002/asna.18720790702By:Hall, A.Publication type:Article
Masthead.Published in:Astronomische Nachrichten, 1872, v. 79, n. 7, p. fmi, doi. 10.1002/asna.18720790701Publication type:Article