Assuming Lưu Xá and Kép stations had already been built prior to 1966. "The First Division had to construct four tunnels, ... four train stations, and several bridges along the Kép-Thái Nguyên [or Ke-Tai, central] line." Col. Hou Zhenlu, quoted in Xiaobing Li, Robert McMahon (2010). Voices from the Vietnam War: Stories from American, Asian, and Russian Veterans. University Press of Kentucky. p. 221. ISBN0-8131-2592-8.
"Vietnam Railways Website (English)". Vietnam Railways. คลังข้อมูลเก่าเก็บจากแหล่งเดิมเมื่อ 2008-05-10. สืบค้นเมื่อ 2008-05-10. Check the timetable from Hanoi to Sai Gon (or vice versa) to see journey times.
"Vietnam Railways Website (English)". Vietnam Railways. คลังข้อมูลเก่าเก็บจากแหล่งเดิมเมื่อ 2008-05-10. สืบค้นเมื่อ 2008-05-10. Check the timetable from Hanoi to Sai Gon (or vice versa) to see journey times.