Mediated communication as a component of distance education /
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| 企业作者: | |
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| 其他作者: | , |
| 格式: | 图书 |
| 出版: |
Hagen, Germany :
FernUniversitat,
1989.
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| 主题: |
| Item Description: | Cover title. At head of title: Fern Universitat - ZIFF- Zentrales Institut fur Fernstudienforschung. |
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| 实物描述: | 89 p. |