A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL. The file type is application/pdf.
application/pdf
R. NAITO, S. KYO, T. SUMI. "Studies on the coloration of grapes. VI." Engei Gakkai zasshi 34.3 (1965) 145-151