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Schlüchter, Christian; KERSCHNER, Hans; HORIE, Shoji (1985). Evidence for valley glaciation in Hidaka Mountains, Hokkaido. II. Poroshiri, Esaoman-Tottabetsu area. Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences, 61(9), pp. 437-440. Nippon Gakushiin 10.2183/pjab.61.437
