@article{oai:kanagawa-u.repo.nii.ac.jp:00000068,
 author = {石黒, 敏明 and Ishiguro, Toshiaki},
 journal = {神奈川大学心理・教育研究論集},
 month = {Mar},
 pages = {49--56},
 title = {English Proficiency Levels of College Students in Japan},
 volume = {23},
 year = {2004}
}