TY  - BOOK
AU  - Sewart,David
AU  - Keegan,Desmond
AU  - Holmberg,Borje
TI  - Distance education: international perspectives 
SN  - 070991525X
PY  - 1983///
CY  - London
PB  - Croom Helm
KW  - Correspondence schools and courses
ER  -