Columbia subject headings:
Harvard subject headings:
Food supply--Government policy--China--Shaanxi Sheng--History--20th century.
Food supply--Government policy--China--Sichuan Sheng--History--20th century.
Shaanxi Sheng (China)--Economic conditions.
Sichuan Sheng (China)--Economic conditions.
Princeton subject headings:
Food supply--Government policy--China--Shaanxi Sheng--History--20th century.
Food supply--Government policy--China--Szechwan Province--History--20th century.
Shaanxi Sheng (China)--Economic conditions.
Sichuan Sheng (China)--Economic conditions.