Tsho paʼi lo rgyus gnaʼ deng mtshon paʼi me long

History and customs of the Tibetan tribes (ru and their smaller tsho pa or tsho shog) in the nomadic pastural area of Dpal-mgon rdzong (Pelgön County), located in Nag-chu (a.k.a Nagchu or Nakchu region) of the Byang-thang (Changthang or Northern Plateau) of Tibet; based on interviews with more than 300 elders between the ages of 70-90 as well as scholars of historical documents on the area.