Hydrographic manual Jeffers, Karl B. creator U.S. Coast and Geodetic Survey contributor text book Washington, D.C Coast and Geodetic Survey 1960- 1960
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ENG Hydrographic surveying VK597 .U5 1960 526.99 Publication, 20-2 Publication (U.S. Coast and Geodetic Survey), 20-2 https://www.biodiversitylibrary.org/bibliography/47643 748983 61060570 10.5962/bhl.title.47643