Roscher, W. G. F., & Wolowski , L. F. M. R. (1882). Principles of political economy: From the 13th (1877) German ed. With additional chapters ... for this 1st English and American ed., on paper money, international trade, and the protective system; and a preliminary essay on the historical method in political economy (from the French). Callaghan and company.

Roscher, Wilhelm Georg Friedrich, and Louis Francois Michel Raymond Wolowski. Principles of Political Economy: From the 13th (1877) German Ed. With Additional Chapters ... for This 1st English and American Ed., on Paper Money, International Trade, and the Protective System; and a Preliminary Essay on the Historical Method in Political Economy (from the French). Chicago: Callaghan and company, 1882.

Roscher, Wilhelm Georg Friedrich, and Louis Francois Michel Raymond Wolowski. Principles of Political Economy: From the 13th (1877) German Ed. With Additional Chapters ... for This 1st English and American Ed., on Paper Money, International Trade, and the Protective System; and a Preliminary Essay on the Historical Method in Political Economy (from the French). Callaghan and company, 1882.