| I: | International Journal of Nautical Archaeology and Underwater Exploration. - Årg. 16nr. 2, 1987 | | Tittel: | Underwater heightmeter; a new handheld precision instrument for elevationmeasuringin underwater surveying | | Ansvar: | H. C. Botma, Th. J. Maarleveld | | Forfatter: | Botma, H. C.  / Maarleveld, Th. J. | | Materialtype: | Analytt | | Signatur: | 930.26:626.02(05) In 8 | | Omfang: | s. 87-94 - Ill. | | Klassenummer: | 902.034.32 | | Note: | References: s. 94 | | Eier: | NSJØF |
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