Thuok
Thuok , also Theok or Tuok , was a Vietnamese measure of length in Annam . It was considered a cubit measure .
- 1 Thuok = 10 Tahk = 100 Fahn = 1,000 Li = 63.88 centimeters (for dealers)
 - 10 Thuok = 1 Düong (Trüong) = 6.39 meters (for dealers)
 - Annam 300 Thuok = 1 Gon = 191.64 meters
 - Annam 15 Thuok = 1 Sao = 7.275 meters
 
literature
- Meyer's Large Conversation Lexicon. Volume 19, Leipzig 1909, p. 512.
 - Brockhaus' Kleines Konversations-Lexikon. Volume 2, Leipzig 1911, p. 835.
 - Helmut Kahnt, Bernd Knorr: Old measures, coins and weights. Bibliographisches Institut, Berlin 1986, ISBN 978-3-41102-148-2 , p. 318.