1.

図書
図書
1. The history of foreign exchange
by Paul Einzig
出版情報: London : Macmillan , New York : St Martin's Press, 1962
2.

図書
図書
2. Handbook of medieval exchange
by Peter Spufford with the assistance of Wendy Wilkinson and Sarah Tolley
出版情報: London : Royal Historical Society, 1986
シリーズ名: Royal Historical Society guides and handbooks ; 13