TY  - BOOK
AU  - Perry,Walter
TI  - The state of distance-learning worldwide: the first report on the index of institutions involved in distance-learning 
AV  - LC6219 P4.8 
CY  - Reino Unido
PB  - International Centre for DistanceLearning of the United Nations University
KW  - Educación a distancia
N1  - Fotocopia
ER  -