TY  - BOOK
AU  - Mackenzie, Norman
AU  - Postagate, Richmond
AU  - Scupham, John
TI  - Open learning: systems and problems in post-secondary education
U1  - 378 
PY  - 1975///
CY  - United Kingdom
PB  - Unesco Press
KW  - Education;Higher education;Open education
ER  -