• MMBC Schoolnet: Commerce - Early Fur Trade
  From the Virtual Maritime Museum, learn more about the early and other important developments in the Northwest. This page includes the three routes discovered and used by various explorers and traders. These routes linked the interior of the continent with the Pacific.
  with economic economics history states united
• Railroad History, Railways, Locomotives, entrepreneurs, business history 19c American, Jensen
  This web page contains resources and information about railroad history, mainly 19th century information, compiled by retired professor of History, Richard Jenson.
  with economic economics history industrial revolution science technology transportation

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