Conlee, Emma C. (September 1953). "The Baxter Family". Washington Highway News. Vol. 3, no. 3. p. 21. OCLC29654162. Retrieved September 14, 2018 – via WSDOT Library Digital Collections.
2016 Annual Traffic Report(PDF) (Report). Washington State Department of Transportation. 2017. p. 211. Archived from the original(PDF) on November 9, 2020. Retrieved September 14, 2018.
State of Washington Highway Map (Map). Washington State Department of Highways. April 1, 1933. Retrieved September 16, 2018 – via Washington State Archives.
2016 Annual Traffic Report(PDF) (Report). Washington State Department of Transportation. 2017. p. 211. Archived from the original(PDF) on November 9, 2020. Retrieved September 14, 2018.
Conlee, Emma C. (September 1953). "The Baxter Family". Washington Highway News. Vol. 3, no. 3. p. 21. OCLC29654162. Retrieved September 14, 2018 – via WSDOT Library Digital Collections.