Article: Evans, Nancy Goyne. 02//1973 Documented Fraktur in the Winterthur collection, Part I. Antiques. 103 (2): 307-18.
• Published as fig. 12, pp. 315 and 318.Article: Weiser, Frederick S. 1987 Christian Mertel, the "C M artist". Der Reggeboge: Journal of the Pennsylvania German Society. 21 (2): 75-85.
Book: Garvan, Beatrice B. 1982 The Pennsylvania German Collection.
• For a fraktur made by Mertel for the sister of this certificate, see no. 12 on p. 299.Book: Earnest, Russell D. & Earnest, Corinne P. 1997 Papers for Birth Dayes: Guide to the Fraktur Artists and Scriveners. 2 vols. 909.
• For more information on Mertel, see vol.2, pp. 544-546.