http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Góp bàn về chuyển biến cục diện chiến tranh trong năm 1972
Lịch sử; Kháng chiến chống Mỹ; Cục diện chiến tranh; Chiến tranh Việt Nam