Based on <a href="//commons.wikimedia.org/wiki/File:Electoral_districts_(Chamber_of_Deputies)_in_Czechoslovakia_1925,_1929,_1935_(numbered).png" title="File:Electoral districts (Chamber of Deputies) in Czechoslovakia 1925, 1929, 1935 (numbered).png">File:Electoral districts (Chamber of Deputies) in Czechoslovakia 1925, 1929, 1935 (numbered).png</a>
<a href="//commons.wikimedia.org/wiki/User:Soman" title="User:Soman">Soman</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>