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Exercises for the ocean yacht navigator | Bok | 527:52 W Wilkes, Kenneth / - London : Nautical publishing in associaton with George G. Harrap , 1976. - 175 s. - Språk: Engelsk | Wilkes, Kenneth | 1976 |
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Exercises in astro-navigation | Bok | 527:52(076) W Watkins, Gordon / - London : Stanford Maritime, 1981. - 174 s. - Språk: Engelsk | Watkins, Gordon | 1981 |