| I: | International Journal of Nautical Archaeology and Underwater Exploration. - Årg. 16 Nr. 2, 1987 | | Tittel: | Underwater heightmeter : a new handheld precision instument for elevation measuring in underwater surveying | | Ansvar: | Th. J. Maarleveld, H. C. Botma | | Forfatter: | Botma, H. C.  | | Materialtype: | Analytt | | Signatur: | 930.26:626.02(05) I | | Utgitt: | London | | Omfang: | 87-94 - Ill. | | Klassenummer: | 902.034.32 | | Note: | References: s.94 | | Eier: | NSJØF |
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