Comments:EDT 362, VEWT 84, TMN 2, 289, ЭСТЯ 2, 221-223, Лексика 482, Stachowski 58. In Tuva, Tof. *-rk > rt is regular. Reconstruction of length is not quite certain: Turkm. length is not confirmed by Khalaj and contradicts pharyngealization in Tofalar. Turk. > WMong. bürgü, Kalm. bürgǝ (KW 67), Khalkha bürx (although theoretically this may as well be an indigenous derivative of bürü-, cf. similar Turkic forms: Tur. dial. bür-me, bür-gü 'headgear').