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NAVIGATION--STUDY AND TEACHING,
Robertson, John, 1712-1776,
The elements of navigation; containing the theory and practice. With the necessary tables, and compendiums for finding the latitude and longitude at sea. To which is added, A treatise of marine fortification. Composed for the use of the Royal Mathematical School at Christ's Hospital, the Royal Academy at Portsmouth, and the gentlemen of the Navy ... By J. Robertson ... The fifth edition, with additions, Carefully
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