Wittendorff, Alex. “Harold J. Grimm: The Reformation Era 1500-1650. Collier-Macmillan, London, 1954. Revised Edition 1965. Second Revised Edition 1973. 594 S. £ 7.80”. Historisk Tidsskrift, bd. 13, januar 1977, https://tidsskrift.dk/historisktidsskrift/article/view/51911.