McFarland, George C. (May–June 1936). "Vivisection of the 251st C. A."(PDF). Coastal Artillery Journal. Fort Monroe, Virginia: Coastal Artillery Training Center, United States Army. Archived(PDF) from the original on 15 September 2020. Retrieved 18 April 2018.
"251st Coast Artillery Regiment (Anti-Aircraft)". California State Military Museums. California Military Department. 23 June 2017. Retrieved 18 April 2018. Headquartered in San Diego with elements in Long Beach, San Diego and San Pedro.
McFarland, George C. (May–June 1936). "Vivisection of the 251st C. A."(PDF). Coastal Artillery Journal. Fort Monroe, Virginia: Coastal Artillery Training Center, United States Army. Archived(PDF) from the original on 15 September 2020. Retrieved 18 April 2018.