Oregon Secretary of State
Oregon Blue Book: Oregon History: Land Based Fur Trade and Exploration
A detailed overview of Oregon's early history, including the Lewis and Clark expedition and what it accomplished, and the development and decline of the fur trade industry.
American University
American University: Ted Case Studies: Hudson Bay Company Fur Trading in 1800s
This site gives an overview of the fur trade with Northwest Coast native peoples in the 1800s, and the impact the fur trade and contact with outsiders had on the natives' way of life.