Great astronomers / by Robert S. Ball. Ball, Robert S. (Robert Stawell), Sir, 1840-1913. Astronomy History. Astronomers. 925.2 BAG Micro-opaque. New York : Readex Microprint, 1973. 4 cards ; 23 x 15 cm. (Landmarks of science) London : Isbister, 1895. 1973. 1895. 1895 Text xii, 372 p. : 4 cards ; 23 x 15 cm. eng