Columbia subject headings:
Art, Chinese--Collectors and collecting--China.
Art, Chinese--Collectors and collecting--United States.
Duanfang, 1861-1911.
Ferguson, John C. (John Calvin), 1866-1945.
Harvard subject headings:
Art, Chinese--Collectors and collecting--China.
Art, Chinese--Collectors and collecting--United States.
Duanfang, 1861-1911
Ferguson, John C. (John Calvin), 1866-1945
Princeton subject headings:
Art, Chinese--Collectors and collecting.
Duanfang, 1861-1911--Art collections.
Ferguson, John C. (John Calvin), 1866-1945--Art collections.