Manual of ice seamanship United States. Hydrographic Office. creator text book Washington G.P.O 1950 1950
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ENG Bibliography: p. ix-x. Cold weather conditions Handbooks, manuals, etc Ice navigation Navy Sea ice Seamanship United States VK545 .U5 1950 H. 0. Pub, no. 551 https://www.biodiversitylibrary.org/bibliography/47774 11163311 10.5962/bhl.title.47774 UDU