RT Article T1 "Inseparable companions": Mary Magdalene, Abelard, and Heloise JF Negotiating community and difference in medieval Europe SP 151 OP 171 A1 Valentine, Susan LA English PB Brill YR 2009 UL https://www.ixtheo.de/Record/1537282492 SN 9789004171251 SN 9004171258