| Craig, William D. GERMANIC COINAGES: CHARLEMAGNE THROUGH WILHELM
II. NP: The Author, 1954.
Lhotka, John F., Jr. MEDIEVAL BRACTEATES: AN EMPIRICAL GUIDE. NP: American Numismatic Association, 1958. Metcalf, D. M. THE COINAGE OF SOUTHERN GERMANY IN THE THIRTEENTH CENTURY. London: Spink & Son, 1961. |