Catalogue of German coins;
gold, silver and minor coins since 1800, with their valuations,
by P. Arnold, D. Steinhilber and H. Kuthmann.
Arnold, P., Steinhilber, D., Küthmann, H. (1972). Catalogue of German coins: gold, silver and minor coins since 1800, with their valuations. New York: Sterling Pub. Co.
Arnold, Paul, Dr. phil, Dirk Steinhilber, and Harald Küthmann. Catalogue of German Coins: Gold, Silver And Minor Coins Since 1800, With Their Valuations. New York: Sterling Pub. Co, 1972.
Warning: These citations may not always be complete (especially for serials).