TY - BOOK AU - Parkyn, George W. ED - Nações Unidas. TI - Towards a conceptual model of life-long education T2 - Educational studies and documents VL - 12 SN - 92-3-101117-0 PY - 1973/// CY - [Paris] PB - Unesco KW - 374.9 KW - int KW - fre ER -