United States. National Diffusion Network.
Far West Laboratory for Educational Research and Development.
United States. Office of Education.
Sopris West Inc.
National Dissemination Study Group (Seattle, Wash.)
National Dissemination Association (U.S.)
1974
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San Francisco, CA : The Laboratory
Educational programs that work
Educational programs that work
Educational programs that work
Educational programs that work (San Francisco, Calif.)
Educational programs that work (San Francisco, Calif.)
Educational programs that work
United States. National Diffusion Network.