Media type: E-Article Title: Robert de Boron’s Angelology and Elements of Heretical Doctrine Contributor: O’GORMAN, RICHARD imprint: Walter de Gruyter GmbH, 1993 Published in: Zeitschrift für romanische Philologie (ZrP), 109 (1993) 5-6 Language: Not determined DOI: 10.1515/zrph.1993.109.5-6.539 ISSN: 0049-8661; 1865-9063 Origination: Footnote: