TY  - BOOK
AU  - Mackenzie, Norman, Postgate, Richmond and Scupham, John
TI  - Open learning: : systems and problems in post-secondary education
SN  - 9231013327
U1  - 374.4 
PY  - 1975///
CY  - Paris
PB  - ; The Unesco Press
KW  - Distance Education
KW  - Education
KW  - Open Learning
ER  -