@inproceedings{weko_197288_1, author = "藤原,巧未 and 長尾,和彦", title = "授業中に居眠りをする学生の割合とCO2濃度の比較", booktitle = "第81回全国大会講演論文集", year = "2019", volume = "2019", number = "1", pages = "501--502", month = "feb" }