Columbia subject headings:
Pinghu lao ding feng jiang yuan--History.
Pinghu lao ding feng jiang yuan--Management.
Sauce industry--China--Pinghu Shi--History.
Harvard subject headings:
Canning and preserving--China--Pinghu Shi--History.
Pickle industry--China--Pinghu Shi--History.
Pinghu lao ding feng jiang yuan--History.
Sauce industry--China--Pinghu Shi--History.
Princeton subject headings: