1960s a group of 5 Mongolian and USSR illustrative covers and
postcards, plus two sheets of USSR stamps in the theme of Mongolia
(1961 40th
1960s a group of 5 Mongolian and USSR illustrative covers and
postcards, plus two sheets of USSR stamps in the theme of Mongolia
(1961 40th Anniv of Mongolian Revolution and 1964 40th Anniv of
Mongolian People's Republic).
1960年代一組五件蒙古及蘇聯美術封片，另附兩版以蒙古為主題之蘇聯版票（1961年蒙古革命四十週年及1964年蒙古人民共和國四十週年）。
