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The snellius- expedition: in the Eastern part of the Netherlands East-Indies 1929-1930 Vol II Part 2 Chapter 1
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<p>A. Depth</p><p>B. Wire Soundings</p><p>C. Echo Sounding</p><p>D. Simultaneous Depth Sounding With Wire, Thermometers and Echo. Accuracy of the Soundings </p><p>E. Ships Reckoning</p><p>F. Accuracy of the Deep-Sea Charts</p>
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