This is a linguistic map of the Morava Banovina in the former Kingdom of Yugoslavia which shows the percentage of the Serbocroatian language. It is made according to data from the 1931 population census.
<a href="//commons.wikimedia.org/wiki/User:Lilic" title="User:Lilic">Lilic</a>
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<span class="int-own-work" lang="en">Own work</span>