@article{oai:shizuoka.repo.nii.ac.jp:00008266,
 author = {Shaffer, Jeffrey Duane},
 journal = {Journal of Shizuoka University Education},
 month = {Mar},
 note = {application/pdf},
 pages = {147--153},
 title = {Bilingual Progression : The Current Sound System of a Young Learner},
 volume = {12},
 year = {2016}
}