Sources:​Valdez, Glicerio V. “With the U.S. 57th Infantry Regiment.” War Memoirs of the Alcala Veterans, by Alberto T. Marquez, New Day Publishers, 1992.Morton, Louis. The Fall of the Philippines. Office of the Chief of Military History, Dept. of the Army, 1953.Patterson, John A. “Transcript of Interview With Royal Reynolds and Richard Rosen.” Philippine Scouts Heritage Society, 2 Aug. 1997.