日本の教育援助活動と視聴覚教育の課題 (<小特集>視聴覚分野における海外協力)
International cooperation activities in educational field and audio-visual education

Seiji Utsumi
1989 Acoustical Science and Technology  
doi:10.20697/jasj.45.12_973 fatcat:ck75hmin3ffptpvhg6jmp3qyf4