Columbia subject headings:
Agriculture--Economic aspects--China--Henan Sheng--Sources.
Buck, John Lossing, 1890-1975.
Henan Sheng (China)--Rural conditions--20th century.
Harvard subject headings:
Agriculture--Economic aspects--China--Henan Sheng--Sources.
Buck, John Lossing, 1890-1975
Henan Sheng (China)--Rural conditions--20th century.
Princeton subject headings: