[1]
Riising, A. 1971. Heresies of the High Middle Ages. Selected sources translated and annotated by Walter L. Wakefield and Austin P. Evans. Records of Civilization: Sources and Studies. New York and London, Columbia University Press, 1969. xiv + 865 s. 10 £ 2 sh. Historisk Tidsskrift. 12, (jan. 1971).