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. This example is not listed.Article: Weiser, Frederick S. 1987 Christian Mertel, the "C M artist". Der Reggeboge: Journal of the Pennsylvania German Society. 21 (2): 75-85.