Minority list documents of 1922-1931 elections: from an exhibition by the Latvian State Historical Archives. The Social Democrats did campaign in Russian, German and Yiddish as well.
Document data: Link to the full atlas: https://www.csb.gov.lv/lv/statistika/statistikas-temas/iedzivotaji/iedzivotaju-skaits/meklet-tema/258-latvijas-statistikas-atlass-xx Publisher’s note: the 1935 census was conducted under an ethno-nationalist dictatorship, so the shares of ethnic Latvians might be inflated.
Publisher’s note: many more relevant documents can be found at www.russkije.lv , some (more about the imperial times) at www.lvmz.lv See also https://www.instagram.com/p/BkQqXwlH7t0/ and https://www.instagram.com/p/Bn67VDsH4f9/ For a Latvian-Polish bilingual school document from 1934, see https://www.facebook.com/photo.php?fbid=10221100091205600
Publisher’s note: these are the first currency notes by the Republic of Latvia, those of 1919 and 1920.