https://openlibrary.org/books/OL6914803M.opdsCatalogus codicum manu scriptorum qui asservantur in Bibliotheca monasterii O.S.B. Engelbergensis in Helvetia.2022-12-29T03:26:13ZEngelberg (Abbey). Bibliothek.https://openlibrary.org/authors/OL2498202A/Engelberg_(Abbey)._Bibliothek.Typis Herderianis][Friburgi Brisgoviae1891xvi, 327 p.lathttps://openlibrary.org/books/OL6914803Mhttps://archive.org/details/cataloguscodicu00gottgoog722270802008434