"Finances. Generalités. 1919-1939." . . . . "Principles of foreign exchange" . . . . . . . . . . "The Principles and arithmetic of foreign exchange"@en . "The Principles and arithmetic of foreign exchange" . "Principles and arithmetic of foreign exchange"@en . . . . . . "Arithmetic of foreign exchange"@en . "Arithmetic of foreign exchange" . . . . . "The Principles and Arithmetic of Foreign Exchange ... Fourth edition"@en . "The principles and arithmetic of foreign exchange"@en . "The principles and arithmetic of foreign exchange" . "The Principles and Arithmetic of Foreign Exchange ... Sixth edition, re-written and enlarged"@en . . "The Principles and Arithmetic of Foreign Exchange ... Fifth edition"@en . . . . . . . . "The Principles and Arithmetic of Foreign Exchange ... Second edition"@en . "The Principles and Arithmetic of Foreign Exchange"@en . . "The Principles and Arithmetic of Foreign Exchange" . . . .