TY  - BOOK
AU  - Whitaker,P.D.
AU  - Parker,C.
AU  - Roebuck,J.S.
TI  - A survey of video distribution systems for educational purposes: a report to the National Council for Educational Technology 
SN  - 0902204106
PY  - 1973///
CY  - London
PB  - National Council for Educational Technology
KW  - Visual education
KW  - United Kingdom
N1  - Bibliography :p. 86-87
ER  -