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海上労衝の変遷(航海技術最近10年の歩み,日本航海学会30周年記念号)
History of Relationship between Japanease Ship Owners and Seamens Union(Development of the Techniques concerned with Navigation)
1978
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History of Relationship between Japanease Ship Owners and Seamens Union(Development of the Techniques concerned with Navigation)
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