Vessels employed in inland navigation : convention regarding the measurement and registration : (final text as adopted by the Inland Waterway Sub-Committee at its 3rd session at Dacca, East Pakistan and signed at Bangkok on June 22, 1956).
Great Britain.Her Majesty's Stationery Office.
United Nations,issuing body.
September, 1957.
Sold but not published by Her Majesty's Stationery Office.