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J. Crease, A. S. Laughton, J. C. Swallow The Significance of Precision Echo Sounding in the Deep Ocean PDF (English)
Eugene L. Bialek Adoption of New Sound Speed Equations by U.S. Naval Oceanographic Office PDF (English)
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F. F. de Castillejo, B. V. Hamon Reducing Meteorological Effects on Monthly Mean Sea Levels PDF (English)
Erkki Mattila, Sakari Pajunen Automation in Hydrographic Surveys Digital Instruments and their Operation on Board the Finnish Survey Vessel "Tauvo" PDF (English)