@article{oai:repository.ffpri.go.jp:02001694, author = {IDO, Hirofumi and 井道, 裕史 and KATO, Hideo and 加藤, 英雄 and NAGAO, Hirofumi and 長尾, 博文}, issue = {1}, month = {Mar}, pages = {13--18}, title = {Influence of the size effect parameter on the bending strength of lumber (Part 2) Examination by the visual grading classification}, volume = {20}, year = {2021} }