Tolong jelaskan mengenai Gora Ivao () dari Urup

Gorshkov, G. S. Volcanism and the Upper Mantle Investigations in the Kurile Island Arc. Monographs in geoscience. New York: Plenum Press, 1970.

Krasheninnikov, Stepan Petrovich, and James Greive. The History of Kamtschatka and the Kurilski Islands, with the Countries Adjacent. Chicago: Quadrangle Books, 1963.

Rees, David. The Soviet Seizure of the Kuriles. New York: Praeger, 1985.

Stephan, John J., The Kuril Islands, Oxford, Clarendon Press, 1974.

Takahashi, Hideki, and Masahiro Ōhara. Biodiversity and Biogeography of the Kuril Islands and Sakhalin. Bulletin of the Hokkaido University Museum, no. 2-. Sapporo, Japan: Hokkaido University Museum, 2004.