Dorin, P. C. (1969). The Lake Superior iron ore railroads. Seattle: Superior Pub. Co.
शिकागो स्टाइल उद्धरणDorin, Patrick C. The Lake Superior Iron Ore Railroads. Seattle: Superior Pub. Co, 1969.
एमएलए उद्धरणDorin, Patrick C. The Lake Superior Iron Ore Railroads. Seattle: Superior Pub. Co, 1969.
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