Status and trends of distance education /
Holmberg, Borje.
Status and trends of distance education / Holmberg Borje. - London : Nichols, c1981. - 200 p.
0850384141
Correspondence school and courses.
Status and trends of distance education / Holmberg Borje. - London : Nichols, c1981. - 200 p.
0850384141
Correspondence school and courses.