Columbia subject headings:
Harvard subject headings:
Huai'an Xian (Chian)--History--Sources.
Irrigation--China--Huai'an Xian.
Rivers--China--Huai'an Xian.
Princeton subject headings:
Huaian Xian (Chian)--History--Sources.
Irrigation--China--Huaian Xian.
Rivers--China--Huaian Xian.