Ioannis Saresberiensis Metalogicon - Ioannis : Saresberiensis. (OLS)http://ftis/name/91697; Hall, J.B. (OLS)http://ftis/name/73209; Keats-Rohan, K.S.B. (OLS)http://ftis/name/73210 (Typographi Brepols editores pontificii, 1991)