Countess Anna of East Friesland - A high-born woman of the late Reformation, 1540-1575. On the beginnings of the Confessional period in German and Dutch Reformed Churches
Ap. Luttenberger, Countess Anna of East Friesland - A high-born woman of the late Reformation, 1540-1575. On the beginnings of the Confessional period in German and Dutch Reformed Churches, HIST JAHRB, 120, 2000, pp. 483-485