The First All-Union Philatelic Exhibition was held in Moscow in 1924–1925.
The First All-Union Philatelic Exhibition was held in Moscow in 1924–1925.
The First All-Union Philatelic Exhibition was held in Moscow in 1924–1925.
단순화: The First All-Union Philatelic Exhibition was held in Moscow in 1924–1925. 산출: