In Vietnam, 20th century , a unit of area, = 36 square meters (about 43.06 square yards).
United Nations, 1966.
In Vietnam, 20th century , a unit of capacity used for trade in soil, an area of 3 ngû by 3 ngû, excavated to a depth of 1 thuớc, approximately 14.4 cubic meters (about 2.09 cubic yards).
United Nations, 1966.
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Last revised: 8 March 2008.