Kumor, Bolesław. “Review: ‘The Archives of Silesian Church History’. Edited by Joachim Köhler on Behalf of the Institute for East German Church and Cultural History, Jan Thorbecke Verlag, Sigmaringen 1988”. Our Past, vol. 75, June 1991, pp. 353-6, doi:10.52204/np.1991.75.353-356.