Notes on the minor trigonometrical work of the Ordnance Survey /
Close, C. F.
Great Britain.Ordnance Survey.
London : Printed under the authority of H.M.S.O. by the Director-General, Ordnance Survey Office, Southampton,
1933.
Previous ed.: 1913.
(2 copies)
Great Britain. Ordnance Survey.
Surveying.
Cartography.
Spherical trigonometry.