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University Park, PA: American Center for the Study of Distance Education, Pennsylvania State University, 1997
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Oxford: Oyford University Press (OUP), 2019
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2019
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2019
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2019
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SAGE Publications, 2007
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Springer Science and Business Media LLC, 2004
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Informa UK Limited, 2011
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SAGE Publications, 1996
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2019
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Wiley, 2004
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Informa UK Limited, 1998
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Wiley, 2009
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Elsevier BV, 1990
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American Geophysical Union (AGU), 1989
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Elsevier BV, 2002
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Mary Ann Liebert Inc, 2018
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Elsevier BV, 1989
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Wiley, 2021
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S. Karger AG, 2022