^"$10,000 Hartwell Estate". Los Angeles Herald. Los Angeles, California. 28 May 1920. p. A7. Retrieved 9 February 2019.
External links
"Select Man for Coroner; Calvin Harwell is Favorite Choice". Los Angeles Herald. Los Angeles, California. 27 January 1908. p. 7. Retrieved 9 February 2019.
"Calvin Hartwell is Elected Coroner". Los Angeles Herald. Los Angeles, California. 28 January 1908. p. 10. Retrieved 9 February 2019.
"Calvin Hartwell". San Pedro Daily News. San Pedro, California. 15 August 1910. p. 2. Retrieved 9 February 2019.
"Charge Hartwell Has Ignored Law". Los Angeles Herald. Los Angeles, California. 6 November 1910. p. 7. Retrieved 9 February 2019.
"Coroner Hartwelll Dies in Pasadena". San Pedro Daily News. San Pedro, California. 20 May 1920. p. 4. Retrieved 9 February 2019.