Columbia subject headings:
Xu, Hongzu, 1586-1641--Travel--China.
Xu, Hongzu, 1586-1641. Xu Xiake you ji.
Harvard subject headings:
Xu, Hongzu, 1586-1641--Travel--China.
Xu, Hongzu, 1586-1641. Xu Xiake you ji.
Princeton subject headings: