http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trong tập1 của bộ sách "Lịch sử Thế giới", sách giới thiệu về thời Trung cổ châu Âu và Trung Hoa từ Ngũ đại đến Nguyên.