Great Britain. Hydrographic Office. & Great Britain. Admiralty. (1905). List of observations for the variation of the compass made by officers of H. M. ships, Indian Marine Survey, and National Antarctic vessel "Discovery", during ... 1900-1905. Printed for H. M. Stationery off., by Eyre and Spottiswoode.

Great Britain. Hydrographic Office. and Great Britain. Admiralty. List of Observations for the Variation of the Compass Made by Officers of H. M. Ships, Indian Marine Survey, and National Antarctic Vessel "Discovery", During ... 1900-1905. Printed for H. M. Stationery off., by Eyre and Spottiswoode, 1905.