Sources
- Hsu Long-hsuen and Chang Ming-kai, History of The Sino-Japanese War (1937–1945) 2nd Ed., 1971. Translated by Wen Ha-hsiung, Chung Wu Publishing; 33, 140th Lane, Tung-hwa Street, Taipei, Taiwan Republic of China. Pg. 180- 184 and Map 3
- Jowett, Phillip S., Rays of The Rising Sun, Armed Forces of Japan's Asian Allies 1931-45, Volume I: China & Manchuria, 2004. Helion & Co. Ltd., 26 Willow Rd., Solihul, West Midlands, England.
- Perry-Castañeda Library Map Collection, China 1:250,000, Series L500, U.S. Army Map Service, 1954- . Topographic Maps of China during the Second World War.
- Chang-Chia-K'ou(Kalgan) nk50-10 Area of fighting on Great Wall and east of Nankou.
- Perry-Castañeda Library Map Collection, Manchuria 1:250,000, Series L542, U.S. Army Map Service, 1950- . Topographic Maps of Manchuria during the Second World War.
- Cheng Te nk50-11 Nankou area.
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