TY  - BOOK
AU  - Keegan,Desmond.
TI  - theoretical principles of distance education
SN  - 0-415-08942-5
U1  - 378.03 THE 20th
PY  - 1993///
CY  - London
PB  - Routledge
KW  - Education--Aims and objectives
KW  - Educational technology
KW  - Distance education
KW  - title
ER  -