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By Sigismund von Dobschütz - Own work, CC BY-SA 3.0, Link
Public Domain, Link
By Drawn by User:SKopp, redrawn by User:Denelson83 and User:Zscout370 Recode by cs:User:-xfi- (code), User:Shizhao (colors) - Own work, http://www.protocol.gov.hk/flags/eng/n_flag/design.html, Public Domain, Link
By Severin.stalder, CC BY-SA 3.0, Link
By Anna Frodesiak - Own work, CC0, Link