A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
龜山 直人. "水溶液に於けるディチアン・ディアミドの電離に就て." The Journal of the Society of Chemical Industry Japan 24.11 (1921) 1263-1267