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​Dang Soo!
WDU International
Call or Fax (Korea)
011-82-31-666-2480

(in the US or for English) 
Contact: SBN James Pumarejo
Phone: (520) 290-9200
Email: tsdmdk@hotmail.com

WDU-USA
Contact: SBN Kristin Duethorn
Phone: (860) 377-0582
E-Mail: kduethorn@questmartialarts.us
​
​Contact your Regional Director