"The Illustrated Postal Covers of The Mongolian Peoples Republic (1942-1992)”. Useful reference of Mongolian philately. Superb
"The Illustrated Postal Covers of The Mongolian Peoples Republic (1942-1992)”. Useful reference of Mongolian philately. Superb condition.《The Illustrated Postal Covers of The Mongolian Peoples Republic (1942-1992)》一冊，重要之蒙古郵學參考書，品相上佳。
