Flag map of Czechoslovakia (1918-1938)
This file was derived from:

 Chehs1919(ru).svg: 
Flag of the Czech Republic (5-3).svg:
Chehs1919(ru).svg: PANONIAN
Flag of the Czech Republic (5-3).svg: derivative work: Vexilloguy
Flag of the Czech Republic.svg: cs:-xfi-
Derivative work: Bazi