Kelly, W A., Beyer, J., & Kopp, U. (2014). The German book in Wolfenbüttel and abroad: Studies presented to Ulrich Kopp in his retirement. University of Tartu Press.

The German book in Wolfenbüttel and abroad : Studies presented to Ulrich Kopp in his retirement / edited by William A. Kelly and Jürgen Beyer . — Tartu : University of Tartu Press, 2014. — 1 Online-Ressource (344 Seiten); Illustrationen. — (Studies in reading and book culture) (1). — ISBN 9789949326082

Kelly, William A., et al. The German Book in Wolfenbüttel and Abroad: Studies Presented to Ulrich Kopp in His Retirement.University of Tartu Press, 2014.