TY  - BOOK
AU  - Sewart,David
AU  - Keegan,Desmond
AU  - Holmberg,Borje
TI  - Distance education: international perspectives 
SN  - 0415010519
PY  - 1988///
CY  - London
PB  - Routledge
KW  - Distance education
N1  - First published in 1984 by Croom Helm, London; Includes bibliographical references and index
ER  -