US-PA(1891) p756 JENKSTOWN, WHARTON RAILROAD SWITCH COMPANY.jpg
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US PA(1891) p756 JENKSTOWN, WHARTON RAILROAD SWITCH COMPANY, King's Hand-book of the United States (1891) by SWEETSER, Uploaded by the British Library, Images from the British Library Mechanical Curator collection, Images from the British Library
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ja
合衆国法典第2版、p756 JENKSTOWN、WHarton RAILROAD SWITCH COMPANY、キングズ・ハンドブック、大英図書館、大英図書館、大英図書館の画像
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switch over wharton