@article{oai:otsuma.repo.nii.ac.jp:00006494,
 author = {ITO, Takehiko},
 journal = {Otsuma review},
 month = {Jul},
 pages = {97--112},
 title = {A Suitability Evaluation of Textbook Contexts Introducing Grammar},
 volume = {50},
 year = {2017}
}