| 択捉阿登佐岳の全景スケッチ。右肩に外輪山の一部。 |
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| Gorshkov, G.S. (1958) Catalogue of the active volcanoes of the world including solfatara fields, Part VII, Kurile Islands. International Association of Volcanology, Rome. Fig.8 | ||
| Sketch of Etorofu Atosa-dake showing part of somma volcano on the right shoulder of the volcano. |