戦後70年 志の軌跡 番外編 憲法が揺らぐ時代に ＜下＞ 作曲家・横山菁児さん＝三次市 [70 Years Since the End of World War II: Trail of Aspiration, Extra Edition: In an Era of Wavering Constitutional Law (Part 2): Composer Seiji Yokoyama from Miyoshi]. The Chugoku Shimbun (in Japanese). May 13, 2015. Retrieved April 10, 2022.
