Columbia subject headings:
Harvard subject headings:
Buttons--China--Collectors and collecting.
Emblems--China--Collectors and collecting.
Heads of state--China.
Mao, Zedong, 1893-1976
Princeton subject headings:
Catalogs.
Mao, Zedong, 1893-1976--Collectibles--Catalogs.
Mao, Zedong, 1893-1976--Portraits.
Pin-back buttons--China--Catalogs.
Portrait miniatures--China--Prices.