3ELY,DONALD P. The field of educational technology: update 2000,a dozen frequently asked questions [EB/OL].http://www.ericdigests.org/eric-digests.html.
4ELY,DP. Toward a Philosophy of Instructional Technology [J]. British Journal of Educational Technology, 1970 ( 1 ) :81-94.
5SAETTLER,PAUL. The evolution of American educational technology[M]. Englewood,CO: Libraries Unlimited, 1990(17).
6FINN,JD. A walk on the altered side. In DP Ely & T. Plomp (Eds.),Classic. writings on instructional technology. Englewood, Colorado: Libraries Unlimited, 1962 : 47-55.
7ELY,DP. Toward a Philosophy of Instructional Technology [J]. British Journal of Educational Technology, 1970, (1) :81-94.
8SOLOMON,DL. Philosophical Inquiry in Instructional Technology: The Forgotten Pathway to Learning [ C ]. Paper presented at the Association for Education Communication and Technology (AECT) 2000 International Convention, Long Beach, CA, 2000.
9ELY, DP.A Brief Review of Educational Technology Definitions [ N ]. Personal Communication Materials Via Email. 2004-06-24.
10Ely,D.P. The field of educational technology: a statement of definition [J ]. Audiovisual Instruction, 1972 (17) : 36-43.
