Wikimedia
Wikipedia: Teapot Dome Scandal
Wikipedia provides good reference material and pictures about this political scandal involving the oil industry during the 1920s.
US Senate
Historic Minute Essays: Senate Investigates the Teapot Dome Scandal
This site from the United States Senate provides an article on the investigation into the Teapot Dome Scandal and its findings. The information is somewhat brief, but factual, and worth checking out on the subject.