TY  - BOOK
AU  - Unwin, Derick.
AU  - McAleese, Ray.
TI  - Encyclopaedia of Educational Media Communications and Technology
SN  - 0333185501
U1  - REF 371.3078 UNW 
PY  - 1978///
CY  - London
PB  - The Macmillan Press ltd.
KW  - Educational Media Communications and technology
N1  - Includes Bibliographical references
ER  -