Cape astrographic zones : Catalogue of rectangular co-ordinates and diameters of star-images derived from photographs taken at the Royal observatory, Cape of Good Hope. Commenced under the direction of Sir David Gill ... /
Gill, David,1843-1914.
Hough, S. S.(Sydney Samuel),1870-1923.
Royal Observatory, Cape of Good Hope.
London : Published by order of the Lords Commissioners of the Admiralty ... H.M.S.O.,
1913-26.
v. 1. Zone -41,̊ 1913. -- v. 2. Zone -42,̊ 1914. -- v. 3. Zone -43,̊ 1915. -- v. 4. Zone -44,̊ 1916. -- v. 5. Zone -45,̊ 1922. -- v. 6. Zone -46,̊ 1923. -- v. 7. Zone -47,̊ 1916. -- v. 8. Zone -48,̊ 1925. -- v. 9. Zone -49,̊ 1926. -- v. 10. Zone -50,̊ 1924. -- v. 11. Zone -51,̊ 1926.
Astrographic catalog and chart.