@misc{oai:tsukuba-tech.repo.nii.ac.jp:00001708,
 author = {大沢, 秀雄 and Ohsawa, Hideo},
 month = {2020-02-26},
 title = {くぼみ入りはがき},
 year = {},
 yomi = {オオサワ, ヒデオ}
}