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18_882" rel="nofollow">sim_economist_1860-07-21_18_882</a>. Next issue: <a href="https://archive.org/details/sim_economist_1860-08-04_18_884"...

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PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:The_Economist_1876-07-29-_Vol_34_Iss_1718_(IA_sim_economist_1876-07-29_34_1718).pdf...

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States//commons.wikimedia.org/wiki/File:The_Engineering_and_Mining_Journal_1908-11-28-_Vol_86_Iss_22_(IA_sim_engineering-and-mining-journal_1908-11-28_86_22).pdf...

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