Published in 1935, "The Turkey of Ataturk" by Donald Everett Webster.
Map showing the population structure in 1927. The source is copyright-left in USA. The data used in the images are census data, which is in the Public Domain.
The original uploader was <a href="https://en.wikipedia.org/wiki/User:Karabekir" class="extiw" title="wikipedia:User:Karabekir">Karabekir</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
1935
<p>Per above.
</p>
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons by <a href="//commons.wikimedia.org/wiki/User:Leptictidium" title="User:Leptictidium">Leptictidium</a> using <a href="https://iw.toolforge.org/commonshelper/" class="extiw" title="toollabs:commonshelper/">CommonsHelper</a>.