Columbia subject headings:
Harvard subject headings:
Cheng, Hao, 1032-1085--Quotations.
Cheng, Yi, 1033-1107--Quotations.
Philosophy, Chinese--960-1644--Quotations, maxims, etc.
Princeton subject headings:
Cheng, Hao, 1032-1085--Quotations.
Cheng, Yi, 1033-1107--Quotations.
Philosophy, Chinese--960-1644--Quotations, maxims, etc.