Debris Supply Periods Estimated from Weathering-Rind Thickness in Rubble on the West-Facing Slope of Mt. Yakushidake, the Northern Japanese Alps 論文 Takeei Koizumi・Shoichi AOYAGI ·1993-01-01 ·『Geographical Review of Japan』 66(5) pp. 269-286 doi:10.4157/grj1984a.66.5_269