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How the riddle came to be | Analytt | q629.125(05) C Drummond, Malwin / I: Classic Boat. - No.184, 2003 - Croydon, 2003. - s.52-56 | Drummond, Malwin | 2003 |
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Sandens gåte | Bok | 82 C Childers, Erskine / - Oslo : Båt & Bok, Hjemmet, 1988. - 289 s.+2 kart - Språk: Norsk (bokmål) | Childers, Erskine | 1988 |
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The riddle of the sands : a record of secret service recently achieved | Bok | 82 C Childers, Erskine, red. / - London, 1979. - 260 s. - Språk: Engelsk | Childers, Erskine, red. | 1979 |