Gudonis, Vytautas. “THE IMAGE A VISUALLY IMPAIRED PERSON IN PHILATELY AS A MEANS OF FORMING AN ADEQUATE ATTITUDE TOWARDS THE BLINDNESS AND BLIND”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 4 (May 21, 2019): 390–399. Accessed March 11, 2026. https://archive-journals.rtu.lv/sie/article/view/2163.