Garrison, D. R. 1945-
Understanding distance education : a framework for the future / D.R. Garrison. - London ; New York : Routledge, 1989. - 139p.
0415020905
90012017
Distance education.
Educational technology.
Understanding distance education : a framework for the future / D.R. Garrison. - London ; New York : Routledge, 1989. - 139p.
0415020905
90012017
Distance education.
Educational technology.