http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Thời kì đế quốc chủ nghĩa những năm 1870 - 1917
F.Ia.Polianxki, Trương Hữu Quýnh dịch
ĐTTS ghi: Sách tham khảo nước ngoài