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Concepts: Research in distance education: A system modeling approach |
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| Authors: | Farhad Saba David Twitchell |
| Affiliation: | 1. Associate professor of Education Technology, College of Education , San Diego State University , San Diego, California, 92182–0311;2. Instructional developer at General Dynamics, Data Systems Division, and a graduate student in the Department of Educational Technology , San Diego State University , 826A Sapphire Street, San Diego, California, 92109 |
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