URL https://www.researchgate.net/profile/Hiromitsu-Yamagishi/publication/251085654/figure/fig2/AS:965231664721920@1607140570288/The-regional-distribution-of-landslides-in-Hokkaido-Yamagishi-1993_Q640.jpg
URL2https://www.researchgate.net/figure/The-regional-distribution-of-landslides-in-Hokkaido-Yamagishi-1993_fig2_251085654
