Kaepʻyŏn Sŏul Tʻŭkpyŏl sigado.
Hanʼgong Chido Kongŏpsa.
Sŏul Tʻŭkpyŏlsi : Hanʼgong Chido Kongŏpsa,
1971.
Shows radial distances of Seoul area.
Includes inset showing changes of jurisdiction from 1949 to present.