This primary source comes from the Records of the Environmental Protection Agency.
National Archives Identifier:
555427Full Citation: Both Oregon And Washington States Led The Nation In Reducing Driving Speeds To Conserve Gasoline Before Federal Limits Were Passed. A Speed Limit Sign And A Reminder Are Shown Along Interstate #5; 11/1973; Records of the Environmental Protection Agency, Record Group 412. [Online Version, https://www.docsteach.org/documents/document/both-oregon-and-washington-states-led-the-nation-in-reducing-driving-speeds-to-conserve-gasoline-before-federal-limits-were-passed-a-speed-limit-sign-and-a-reminder-are-shown-along-interstate-5, May 11, 2024]