A survey of video distribution systems for educational purposes a report to the National Council for Educational Technology
Whitaker, P. D.(Peter Dudley),1927-
Parker, C. J.(Colin John)1946-
Roebuck, John Spencer.
National Council for Educational Technology.
London National Council for Educational Technology Distributed by Councils and Education Press
1973
Bibliographyp.86-87
Television in education
Television relay systems.