1908
Great Britain. General Staff. Geographical Section.
1910
United States. Army. General Staff. Military Intelligence Division.
1936
Automobile Club of China
1:100k
1937
Sentoksha Bunshin Nihon Chosun Osaka University
1927
Great Britain. War Office. General Staff. Geographical Section.
1945
Ya Kwang Geographical Institute
1:24k
Great Britain. Ordnance Survey.
Fujin Minshu Kurabu
1885
RATZEL, Friedrich.
1909
Saito, K.
