@techreport{oai:tsukuba-tech.repo.nii.ac.jp:00001630,
 author = {石原, 保志 and Ishihara, Yasushi and 大沼, 直紀 and Ohnuma, Naoki},
 month = {2020-02-26},
 title = {Communication Development},
 year = {},
 yomi = {イシハラ, ヤスシ and オオヌマ, ナオキ}
}