Geyer, Martin H. (2001): One Language for the World. The Metric System, International Coinage and the Rise of Internationalism, 1850-1900. In: Geyer, Martin H.; Paulmann, Johannes (Hrsg.): The Mechanics of Internationalism in the Nineteenth Century. Culture, Society, and Politics from the 1840s to the First World War. Oxford: Oxford University Press. S. 55-92
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