TY  - BOOK
AU  - Davies,Ivor K.
AU  - Hartley,James
TI  - Contributions to an educational technology
SN  - 0408701382
U1  - 371.3078 
PY  - 1972///
CY  - London
PB  - Butterworths
KW  - Educational technology
N1  - Includes bibliographical references and indexes
ER  -