TY  - BOOK
AU  - MacKenzie,Norman Ian
AU  - Postgate,Richmond Seymour
AU  - Scupham,John
TI  - Open learning: systems and problems in post-secondary education
SN  - 9231013327
PY  - 1975///
CY  - Paris
PB  - Unesco Press
KW  - University extension
KW  - Case studies
ER  -