Charts. Paramushiru Kaikyo, Chishima Retto (Kuril Islands), Japan, from Japanese naval surveys of 1912 and 1935, natural scale 1:24,293; Hitokappu Wan, Etorofu Shima, Chishima Retto (Kuril Islands), Japan, Japanese naval surveys of 1910, natural scale 1:40,511; provisional H. O. no. 1889. n. p.

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