http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tháng 4/1973; Tổ Trung tâm được thành lập; Kế hoạch chiến lược giải phóng miền Nam; Hội nghị lịch sử; Chủ trương chiến lược ; Kế hoạch giải phóng miền Nam; Lịch sử