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Survey of the Imperial Japanese Navy, 1918 with additions from other sources to 1939
Polygon: 34.68472222,135.3708333 34.68472222,135.4883333 34.61666667,135.4883333 34.61666667,135.3708333 34.68472222,135.3708333
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Special Collections & Archives, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/sca)
1st edition, No. 6394
Public Domain (US)
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