Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: History
Author of work: Poggius
Title: Defensiuncula
Subject: Canon Law
Title: Commentary on Decretals
Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Canon Law
Title: Commentary on Decretals
Subject: Canon Law
Title: Commentary on Decretum Gratiani
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Philosophy
Author of work: Boethius
Title: De consolatione philosophiae
Subject: Canon Law
Author of work: Innocent IV
Title: Decretales
Subject: Philosophy
Author of work: Aristoteles
Title: De anima