In Vietnam, ? – 20th century, two units:
- a unit of area, = 3600 square meters.
- a unit of capacity used for soil, the volume of soil contained in an area 30
ngũ by 30 ngũ, excavated to a depth of 1
thuớc, approximately 1,440 cubic meters.
Both:United Nations 1966.
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Last revised: 8 May 2001.