BUDAK, Yunus. “A LOOK AT THE HISTORY OF THE POSTAL: ESTABL?SHMENT OF POSTAL AND TELEGRAPH ORGANIZATION”. Eurasian Eononometrics, Statistics and Emprical Economics Journal (September 15, 2020): 30–46. Accessed July 3, 2024. https://eurasianacademy.org/index.php/econstat/article/view/1011.