TY  - BOOK
AU  - MacKenzie,Norman
AU  - Postgate,Cichmond
AU  - Scupham,John
ED  - UNESCO
TI  - Open learning: Systems and problems in post-secondary education 
SN  - 9231013262 (softbound)
PY  - 1975///
CY  - Madrid, Esp.
PB  - UNESCO
ER  -