VUGULE, Ērika. Problem of National School in Conceptions of Latvian Teacher’s Professional Organizations (LSS and LNSS), 20th of 20th Century. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 174–182, 2015. DOI: 10.17770/sie2012vol1.33. Disponível em: https://journals.rta.lv/index.php/SIE/article/view/33.. Acesso em: 4 may. 2024.