Tam Điệp pass
(Redirected from Đèo Ba Dội)
- Đức Thọ Ngô, Vạn Nguyên Nguyễn, Philippe Papin - Đồng Khánh địa dư chí - Volume 2 2003 - Page 1533 "Roads, Routes and Itineraries - A main road runs from the mountain of Tam Điệp in the province of Thanh Hoá, at the southem end of the province, passing the stage posts of Ninh Du and Ninh Ða, as far as the Thanh Quyết river. On the ..."
- Administration Atlas of Vietnam. Vietnam Natural Resources and Environment Publishing. Hà Nội, 2013.