<md-subject>Educational technology</md-subject>
<md-subject>Federal aid to education</md-subject>
<md-description>"This directory was developed by the Technology for the National Diffusion Network Project, Teachers College, Columbia University pursuant to contract number OE-300-83-0253, U.S. Department of Education"--T.p. verso</md-description>
<md-subject>Educational technology</md-subject>
<md-subject>Federal aid to education</md-subject>
<md-description>"This directory was developed by the Technology for the National Diffusion Network Project, Teachers College, Columbia University pursuant to contract number OE-300-83-0253, U.S. Department of Education"--T.p. verso</md-description>