Curves of equal magnetic variation, 1871 : Reduced from that Epoch from observations at Sea, made chiefly by the officers of Her Majesty's Navy, and from various Magnetic Surveys undertaken by Colonial and Foreign Governments, 1855-1870. / by Staff Captain F. J. Evans, F.R.S. and Navigating Lieut.t. E. W. Creak, Royal Navy ; Engraved by Mallby & Son
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Place / Publishing House: | London : Admiralty, Nov.r 1.st 1871 |
Year of Publication: | 1871 |
Language: | English |
Physical Description: | 1 Karte; 62 x 94 cm |
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