Starnawska M. Darius von Güttner-Sporzyński, Poland, Holy War and the Piast Monarchy, 1100–1230 (Europa Sacra 14), Brepols, Turnohout 2014, XII + 294 pp. + maps, ISBN: 978-2-503-54794-7. OM [Internet]. 2017 May 9 [cited 2024 Apr. 19];21:223-8. Available from: https://apcz.umk.pl/OM/article/view/OM.2016.011