{"id":"001014963","type":"book","title":"Towing and ballast in ancient ships","publisher":"Hellenic Institute for the Preservation of Nautical Tradition","publisher-place":"Athens","pages":"507-512","container-title":"Tropis. 3. 3rd International Symposium on Ship Construction in Antiquity. Evgenidou Foundation, Athens, 24-27 august 1989. Proceedings","author":[{"family":"Williams","given":"Hector"}],"issued":{"raw":"1995"}}