TY  - BOOK
AU  - Holmberg, Borje
TI  - Theory and practice of distance education / Borje Holmberg
SN  - 0415112923
AV  - LC5800/H65 
PY  - 1994///
CY  - London
PB  - Routledge
KW  - Educación a Distancia
N1  - Monografía
ER  -