Anderson, Gerald R., Subic Bay from Magellan to Pinatubo: The History of the U.s. Naval Station, Subic Bay. Gerald Anderson; 2009. ISBN 978-1-4414-4452-3.
Eby, Cecil D., (2007) Comrades And Commissars: The Lincoln Battalion in the Spanish Civil War. (Penn State Press). ISBN 9780271029108
Schull, Lieut. Herman W. (1901) "Spanish Ordnance in the Defense of Havana". Journal of the United States Artillery, Vol. 15, No. 2, Whole No. 48, pp. 129–146.
United States Congress (1902) Congressional edition, Volume 4285. (U.S. G.P.O.).
United States, Office of Naval Intelligence (1892) Information from abroad. (Govt. Print. Off.).
United States, Office of Naval Intelligence (1899) Information from abroad: War notes, Issues 1-8. United States. 56th Cong., 1st sess., 1899. (Govt. Print. Off.).