jscelibrary.jsce.or.jp/jsce/open/00906/2001/07-0327.pdf · ris 18.4kmæ 18.8km (1987) 1980 7k 1990...
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- JSCElibrary.jsce.or.jp/jsce/open/00906/2001/07-0327.pdf · Ris 18.4kmæ 18.8km (1987) 1980 7k 1990 2000 18.6k 18.4k 1974 1976 1982 1987 1991 £D3 (R23, 21.0kmæ21.2km) 21.0kmæ21.4km
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