RT Article T1 The changing role of Hugolino dei Conti di Segni (Gregory IX): a hermeneutical tool for understanding the lives of Francis JF Miscellanea francescana VO 108 IS 3/4 SP 438 OP 464 A1 Kruse, John V. LA English YR 2008 UL https://ixtheo.de/Record/1646357051