TY  - BOOK
AU  - Mackenzie,Norman
AU  - Postgate,Richmond
AU  - Scupham,John
TI  - Open learning: systems and problems in post-secondary education 
SN  - 9231013327
U1  - 371.90473 
PY  - 1975///
CY  - Paris
PB  - UNESCO
KW  - University extension
KW  - Case studies
N1  - Includes bibliographical references
ER  -