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
Koichi YAMAGATA. "The effect of cluster sampling on the data precision of person trip survey." Doboku Gakkai Ronbunshu 1984.347 (1984) 163-173