Pedrick, G., & Ireland. Genealogical Office. (1902). Monastic seals of the xiiith century: A series of examples, illustrating the nature of their design and artistic value, selected, introduced, and described. De La More Press.

Pedrick, Gale, and Ireland. Genealogical Office. Monastic Seals of the Xiiith Century: A Series of Examples, Illustrating the Nature of Their Design and Artistic Value, Selected, Introduced, and Described. De La More Press, 1902.