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Instruments for air navigation | Bok | 629.12.05 H Hughes, A.J. / - London, s.n.. - 98 s. - Språk: Engelsk | Hughes, A.J. | s.n. |
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The book of the sextant : with ancient and modern instruments of navigation | Bok | 629.12.05 H Hughes, A.J. / - Glasgow, 1915. - 63 s. - Språk: Engelsk | Hughes, A.J. | 1915 |