Norge, Island, Man og Orknoyene. In Heraldisktidsskrift, Vol 2, No.20.

• Title	Norge, Island, Man og Orknoyene. In Heraldisktidsskrift, Vol 2, No.20.
  Short Title	Troetteberg (1969).
  Author	Troetteberg, Hallvard.
  Publisher	Societas Heraldica Scandinavica: October 1969.
  Source ID	S1453
  Linked to Individuals: 2	Nils Hallsteinsson Governor Hallstein Torleivsson