The 'Opus majus' of Roger Bacon : vol. 2 / edited, with introd. and analytical table by John Henry Bridges. Univeränderter Nachdruck. Bacon, Roger. Bridges, John Henry. B765.B23 O2 1964 189 BAO Includes bibliographical references. Frankfurt/Main : Minerva-Verlag, 1962. 1962. 1962 Text v. 2 : eng