Relief shown by shading. Each sheet includes index to adjoining sheets. Various issues of some sheets. Covers East Mongolia, East China, East Siberia and North Korea. In Japanese. Dai Nihon Teikoku Rikuchi Sokuryōbu. 大日本帝國陸地測量部. Chosakuken shoyū insatsu ken hakkōsha: Dai Nihon Teikoku Rikuchi Sokuryōbu. 著作権所有印刷兼發行者 大日本帝國 陸地測量部. Teika kin jūni-sen. 定價金拾貳銭.