http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Di chỉ khảo cổ học Phùng Nguyên (Vĩnh Phúc)
Hoàng Xuân Chinh, Nguyễn Ngọc Bích
archaeology, vietnam,bronze age,copper age