(1) “Landslide of Neogene Sediments in Hokuriku District, Niigata Prefecture” by Kishida, S., 1966 Text for Landslide Prevention Engineering Lecture Meeting. p. 1-4
(2) “Lithofacies and Geological Structure in the Landslide Areas in Neogene Sediments” by Tuda, S., Iwanaga S., & Nishida, S., October, 1967 Report for Symposium of Geological Disaster, Geological Society of Japan, p. 58-70
(3) “Mizusawa Shinden Landslide” by Sand Control Sec., Niigata Prefectural Government, October, 1969
(4) “Flow-type Landslide anticipated to take place this spring in Niigatac Prefecture (Forecasting)” by Tuda, K., Iwanaga, S., & Nagata, S., 1970 Landslide, Vol. 6, No. 3, p. 26-30
(5) “Imokawa Landslide” by Tuda, K. & Iwanaga, S., 1969 Synopsis of Report for 8th Symposium of Landslide Research Society
