東オングル島 East Ongul Island(1:5,000)

• Language: Japanese
• Published: 1957
• Subjects: Ongul; Ongul Island; East Ongul Island
• Online Access: https://nipr.repo.nii.ac.jp/record/6806/files/KJ00002475819.pdf; https://nipr.repo.nii.ac.jp/records/6806

S(会告など) departmental bulletin paper