@phdthesis{oai:kansai-u.repo.nii.ac.jp:00000063, author = {Koyama, Toshiko and 小山, 敏子}, month = {Sep}, school = {関西大学}, title = {For the Effective Use of Hand-held Electronic Dictionaries in the Japanese EFL Context : Focusing on Retention, Reading Comprehension, and Learners' Impressions}, year = {2006} }