1960s a group of 8 covers from Mongolia to USSR, f.w. various sets
of commemorative issues, including Mongolian Sports,
1960s a group of 8 covers from Mongolia to USSR, f.w. various sets
of commemorative issues, including Mongolian Sports, Mongolists'
Congress, Olympic Games etc.
1960年代一組八件蒙古寄蘇聯封，貼有多套紀念票，包括蒙古運動、蒙古大會、奧運等。
