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Underwater heightmeter : a new handheld precision instument for elevation measuring in underwater surveying | Analytt | 930.26:626.02(05) I Botma, H. C. / I: International Journal of Nautical Archaeology and Underwater Exploration. - Årg. 16 Nr. 2, 1987 - London. - 87-94 | Botma, H. C. | |
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Underwater heightmeter; a new handheld precision instrument for elevationmeasuringin underwater surveying | Analytt | 930.26:626.02(05) In 8 Botma, H. C. / I: International Journal of Nautical Archaeology and Underwater Exploration. - Årg. 16nr. 2, 1987. - s. 87-94 | Botma, H. C. | |