| Type |  Music sound recording |
| ชื่อเรื่อง | Open forum. 1 [sound recording] : academic listening and speaking / Angela Blackwell, Therese Naber |
| ISBN | 0194361101 (audio CDs) |
| | 9780194361101 (audio CDs) |
| พิมพลักษณ์ | [New York] : Oxford University Press, [2007] |
| รูปเล่ม | 3 sound discs (181 min.) : digital ; 4 3/4 in |
| หัวเรื่อง | English language --Textbooks for foreign speakers [] |
| | English language --Sound recordings for foreign speakers [] |
| | English language --Study and teaching --Foreign speakers [] |