Perraton, Hilary.
The techniques of writing correspondence courses / Hilary Perraton. - Cambridge : International Extension College, 1973. - 50 p. ; 21 cm. - IEC broadsheet on distance learning ; no. 2 .
0903632020
Correspondence schools and courses--Curricula.
The techniques of writing correspondence courses / Hilary Perraton. - Cambridge : International Extension College, 1973. - 50 p. ; 21 cm. - IEC broadsheet on distance learning ; no. 2 .
0903632020
Correspondence schools and courses--Curricula.