Subject: Law, Canon Law
Title of work: Decretum
Author of work: Gratian
Place of production: England
Subject: History
Author of work: Ranulphus Higden
Title: Polychronicon
Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Regulae
Author of work: Augustinus
Title: Regula sancti Augustini
Subject: Canon Law
Title: Commentary on Decretals
Subject: Canon Law
Title: Treatise on canon law