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Celestial navigation for yachtsmen | Bok | 527(02) B Blewitt, Mary / - London : Iliffe books, 1955. - 64 s. - Språk: Engelsk | Blewitt, Mary | 1955 |
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Navigation for yachtsmen | Bok | Mag. 527(02) B Blewitt, Mary / - London : Edward Stanford, 1973. - 101 s. - Språk: Engelsk | Blewitt, Mary | 1973 |