Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Ito Yoshihiko and Nakagawa Shin'ichi and Hashimoto Shoji and Kobayashi Takashi and Kikuchi Kohkichi,"Simple and Objective Method to evaluate bedrock conditions of drilling core samples with RQD(N),RCI(N) and modified RCI(N)",Proceedings of the Japan National Conference on Geotechnical Engineering,,The Japanese Geotechnical Society,2004,JGS39,0,143-144,https://cir.nii.ac.jp/crid/1390282680576046720,https://doi.org/10.11512/jiban.jgs39.0.143.0